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15000

5650000

6511000

28569000

41971000

52262000

313000

826000

1825000

32819000

43439000

55101000

5590000

5296000

15000

5650000

6511000

300000

15000

60000

1215000

103000

999000

1175000

2254000

900000

600000

175000

2700000

261000

<div> <div style="margin-left:0%;margin-right:0%;"></div><div style="margin-left:0%;margin-right:0%;">   12. Stock Incentive Plans Stock Option Plans          In February 2008, the Company adopted the 2008 Stock Plan (the "2008 Plan"). The 2008 Plan provides for the granting of options to purchase common stock and common stock to employees, directors and consultants of the Company. The Company may grant incentive stock options ("ISOs"), non-statutory stock options ("NSOs") or restricted stock under the 2008 Plan. ISOs may only be granted to Company employees (including directors who are also considered employees). NSOs and restricted stock may be granted to Company employees, directors and consultants. Options may be granted for terms of up to ten years from the date of grant, as determined by the Board of Directors, provided however, that with respect to an ISO granted to a person who owns stock representing more than 10% of the voting power of all classes of stock of the Company, the term shall be for no more than five years from the date of grant. The exercise price of options granted must be at a price no less than 100% of the estimated fair value of the shares on the date of grant, as determined by the Board of Directors, provided however, that with respect to an ISO granted to an employee who at the time of grant of such option owns stock representing more than 10% of the voting power of all classes of stock of the Company, the exercise price shall not be less than 110% of the estimated fair value of the shares on the date of grant. Options granted to newly hired employees generally vest over four years (generally 25% after one year and monthly thereafter). Options granted to employees as part of their annual bonus compensation are generally fully vested at the grant date.          In October 2013, the Company adopted the 2013 Stock Incentive Plan (the "2013 Plan"). The 2013 Plan was subsequently approved by the Company's stockholders and became effective on November 4, 2013, immediately before the closing of the Company's IPO. Following the effectiveness of the 2013 Plan, no additional options will be granted under the 2008 Plan. An aggregate of 1,700,000 shares were initially reserved for issuance under the 2013 Plan. In addition, to the extent that any awards outstanding or subject to vesting restrictions under the 2008 Plan are subsequently forfeited or terminated for any reason before being exercised or settled, the shares of common stock reserved for issuance pursuant to such awards as of the closing of the IPO will become available for issuance under the 2013 Plan. The remaining shares available for grant under the 2008 Plan became available for issuance under the 2013 Plan upon the closing of the IPO. On the first day of each year from 2014 to 2023, the 2013 Plan authorizes an annual increase of the lesser of 4% of outstanding shares on the last day of the immediately preceding fiscal year or a lesser amount as determined by the Company's Board of Directors. As of December 31, 2015, 1,058,359 shares were available for future issuance under the 2013 Plan.          Pursuant to the 2013 Plan, stock options, restricted shares, stock units, including restricted stock units and stock appreciation rights may be granted to employees, consultants, and outside directors of the Company. Options granted may be either ISOs or NSOs.          Stock options are governed by stock option agreements between the Company and recipients of stock options. ISOs and NSOs may be granted under the 2013 Plan at an exercise price of not less than 100% of the fair market value of the common stock on the date of grant, determined by the Compensation Committee of the Board of Directors. Options become exercisable and expire as determined by the Compensation Committee, provided that the term of ISOs may not exceed ten years from the date of grant. Stock option agreements may provide for accelerated exercisability in the event of an optionee's death, disability, or retirement or other events.          Any outside director who was not previously an employee and who first joins the Company's Board of Directors on or after the effective date of the 2013 Plan will be automatically granted an initial NSO to purchase 35,000 shares of common stock upon first becoming a member of the Board of Directors. Twenty-five percent of the shares subject to the initial option will vest and become exercisable on the first anniversary of the date of grant. The balance (i.e., the remaining 75%) will vest and become exercisable over three years in equal monthly installments. On the first business day after each regularly scheduled annual meeting of stockholders, each outside director who was not elected to the Board of Directors for the first time at such meeting and who will continue serving as a member of the Board of Directors thereafter will be automatically granted an option to purchase 10,000 shares of common stock, provided that the outside director has served on the Board of Directors for at least six months. Each annual option will vest and become exercisable on the first anniversary of the date of grant, or immediately prior to the next regular annual meeting of the Company's stockholders following the date of grant if the meeting occurs prior to the first anniversary date. The options granted to outside directors will have a per share exercise price equal to 100% of the fair market value of the underlying shares on the date of grant and will become fully vested in the event of a change of control. In addition, such options will terminate on the earlier of (i) the day before the 10th anniversary of the date of grant or (ii) the date 12 months after the termination of the outside director's service for any reason.          The following table summarizes activity under the Company's stock option plans (aggregate intrinsic value in thousands):                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 100.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Shares Available for Grant </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Stock Options Outstanding </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Weighted Average Exercise Price </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Weighted Average Remaining Contractual Life (Years) </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Aggregate Intrinsic Value </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Balance—December 31, 2014 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,341,252 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>3,249,469 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>7.59 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>7.88 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>12,400 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Additional options authorized </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>900,946 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Granted </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(1,521,025 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,521,025 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>8.72 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Canceled </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>337,186 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(337,186 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>10.74 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Exercised </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(253,787 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>2.85 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Balance—December 31, 2015 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,058,359 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4,179,521 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>8.03 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>7.50 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>6,511 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Options vested and exercisable—December 31, 2015 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,945,279 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>6.14 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>5.96 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>5,801 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Options vested and expected to vest—December 31, 2015 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4,179,499 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>8.03 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>7.50 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>6,511 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> </table></div>          The aggregate intrinsic value was calculated as the difference between the exercise price of the options to purchase common stock and the fair market value of the Company's common stock, which was $7.20 and $9.66 per share as of December 31, 2015 and 2014, respectively.          The weighted average fair value of options to purchase common stock granted was $5.12, $9.08 and $4.19 for the years ended December 31, 2015, 2014 and 2013, respectively.          The weighted average fair value of stock options vested was $7.01, $3.07 and $2.12 per share for the years ended December 31, 2015, 2014 and 2013, respectively. The aggregate estimated grant date fair value of employee options to purchase common stock vested during the years ended December 31, 2015 and 2014 was $5.3 million and $1.6 million, respectively.          The weighted-average fair value of stock options exercised was $2.00 and $1.18 for the years ended December 31, 2015 and 2014, respectively. The intrinsic value of stock options exercised was $1.8 million, $3.2 million and $4.9 million for the years ended December 31, 2015, 2014 and 2013, respectively. Stock-based Compensation          The following table summarizes stock-based compensation expense related to stock options for the years ended December 31, 2015, 2014 and 2013, and are included in the statements of operations and comprehensive loss as follows (in thousands of dollars):                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="8" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Year Ended December 31, </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2013 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Cost of revenue </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>100  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>51  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>34  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Research and development </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,178  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>790  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>250  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Selling and marketing </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,326  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>707  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>169  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> General and administrative </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>2,998  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>2,000  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>794  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Total stock-based compensation expense </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>5,602  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>3,548  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,247  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> </table></div>          As of December 31, 2015, the Company had $10.6 million of unrecognized compensation expense related to unvested stock options, which is expected to be recognized over an estimated weighted-average period of 2.70 years.          The estimated grant-date fair value of employee stock options was calculated using the Black-Scholes option-pricing model, based on the following assumptions:                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="5" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Year Ended December 31, </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2013 </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Weighted-average volatility </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> 52.56 - 68.82% </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> 70.19 - 78.54% </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> 80.42 - 81.41% </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Weighted-average expected term (years) </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> 5.50 - 6.08 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> 5.50 - 6.08 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> 5.00 - 6.08 </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Risk-free interest rate </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> 1.55 - 2.03% </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> 1.66 - 2.04% </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> 0.88 - 2.11% </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Expected dividend yield </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> — </td> </tr> </table></div>          The estimated fair value of non-employee stock options was calculated using the Black-Scholes option-pricing model, based on the following assumptions:                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="5" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Year Ended December 31, </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2013 </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Weighted-average volatility </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> 64.72 - 74.48% </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> 73.20 - 74.48% </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> 77.86 - 78.14% </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Weighted-average expected term (years) </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> 7.92 - 10.00 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> 8.75 - 10.00 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> 7.72 - 9.75 </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Risk-free interest rate </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> 1.78 - 2.29% </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> 2.09 - 2.20% </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> 2.59 - 2.99% </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Expected dividend yield </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> — </td> </tr> </table></div> Equity-based Compensation          In February 2013, the Company's Board of Directors authorized the grant of 100,498 fully vested stock options at a fair value of $2.59 per option, determined using the Black-Scholes option-pricing valuation model, resulting in a $259,000 expense in the year ended December 31, 2012. Upon issuance of the options, the accrued liability was reclassified into additional paid-in capital. For the years ended December 31, 2015, 2014 and 2013, the Company paid executive bonuses only in the form of cash. </div><div style="margin-left:0%;margin-right:0%;"> </div><div style="margin-left:0%;margin-right:0%;"></div> </div>

-6.15

-0.32

-1.36

-0.01

-0.31

-0.37

-0.36

-0.34

-1.30

-0.02

-0.35

-0.32

-0.29

2673000

4212000

P2Y8M12D

10600000

86000

0.00

P8M1D

P7Y3M18D

P1D

P7Y

0.44

0.737

0.364

0.814

0.021

0.020

0.185

300000

-2070000

-2100000

-2070000

-86000

-175000

-2653000

-2700000

-583000

257000

800000

15200000

P15Y

12100000

18854000

22583000

1057000

-25580000

-29373000

-33704000

<div> <div style="margin-left:0%;margin-right:0%;"></div><div style="margin-left:0%;margin-right:0%;">   15. Income Taxes          The Company generated a pretax loss of $33.7 million, $29.4 million and $25.6 million in the United States for the years ended December 31, 2015, 2014 and 2013, respectively. Since inception, the Company has not generated any pretax income or loss outside of the United States. The Company recorded no provision for income taxes during the year ended December 31, 2015, 2014 or 2013.          The Company follows FASB ASC No. 740, Income Taxes for the Computation and Presentation of its Tax Provision. The following table presents a reconciliation of the tax expense computed at the statutory federal rate and the Company's tax expense for the period presented (in thousands of dollars):                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="8" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Year Ended December, 31, </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2013 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> U.S. federal taxes at statutory rate </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(11,459 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(9,987 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(8,697 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;"> ) </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> State tax (net of federal benefit) </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(30 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>5 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>11 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Permanent differences </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>96 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>64 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>790 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Incentive stock options </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>789 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>672 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>355 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Tax credits </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(581 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(461 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(502 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;"> ) </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Change in valuation allowance </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>11,185 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>9,707 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>8,043 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Total </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> </table></div>          Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company's deferred tax assets and liabilities are as follows (in thousands of dollars):                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="8" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Year Ended December 31, </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2013 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Deferred tax assets: </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Net operating loss carryforwards </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>52,262 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>41,971 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>28,569 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Research and development credits </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>2,497 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,916 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,455 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Stock-based compensation </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,825 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>826 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>313 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Genzyme co-promotion agreement </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>330 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>995 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,792 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Accruals, deferred rent and other </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4,698 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>3,381 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>705 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Gross deferred tax assets </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>61,612 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>49,089 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>32,834 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Valuation allowance </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(55,101 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(43,439 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(32,819 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;"> ) </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Net deferred tax assets </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>6,511 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>5,650 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>15 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Deferred tax liabilities: </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Property and equipment </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(1,215 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(60 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(15 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;"> ) </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> In-process research and development </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(5,296 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(5,590 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Gross deferred tax liabilities </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(6,511 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(5,650 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(15 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;"> ) </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Net deferred tax liabilities </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(6,511 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(5,650 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(15 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;"> ) </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Net deferred taxes </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> </table></div>          In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes, related to balance sheet classification of deferred taxes. The ASU requires that deferred tax assets and liabilities be classified as noncurrent in the statement of financial position, thereby simplifying the current guidance that requires an entity to separate deferred assets and liabilities into current and noncurrent amounts. The ASU will be effective for the Company beginning in the first quarter of fiscal year 2018 though early adoption is permitted. The Company has early-adopted the ASU as of December 31, 2015 and its statement of financial position as of this date reflects the revised classification of current deferred tax assets and liabilities as noncurrent. The Company has early-adopted this ASU prospectively and prior periods have not been retrospectively adjusted. There is no other impact on the Company's financial statements of early-adopting the ASU.          The Company has established a full valuation allowance against its net deferred tax assets due to the uncertainty surrounding realization of such assets. The valuation allowance increased $11.7 million, $10.6 million and $8.1 million during the years ended December 31, 2015, 2014 and 2013, respectively.          As of December 31, 2015, the Company had net operating loss carryforwards of approximately $143.8 million and $53.8 million available to reduce future taxable income, if any, for federal and state income tax purposes, respectively. Of these amounts, $1.6 million represent federal and state tax deductions from stock-based compensation, which will be recorded as an adjustment to additional paid-in capital when they reduce tax payable. The U.S. federal net operating loss carryforwards will begin to expire in 2026 while for state purposes, the net operating losses will begin to expire in 2016.          As of December 31, 2015, the Company had net credit carryforwards of approximately $2.7 million and $2.1 million available to reduce future taxable income, if any, for federal and state income tax purposes, respectively. The federal credit carryforwards begin to expire in 2028. California credits have no expiration date. Other state credit carryforwards begin to expire in 2023.          On December 18, 2015, The Consolidated Appropriations Act of 2014 was signed into law, which retroactively reinstated and made permanent the federal research tax credit provisions from January 1, 2015 through December 31, 2015.          The Internal Revenue Code of 1986, as amended, imposes restrictions on the utilization of net operating losses and tax credits in the event of an "ownership change" of a corporation. Accordingly, a company's ability to use net operating losses and tax credits may be limited as prescribed under Internal Revenue Code Section 382 and 383 ("IRC Section 382"). Events which may cause limitations in the amount of the net operating losses or tax credits that the Company may use in any one year include, but are not limited to, a cumulative ownership change of more than 50% over a three-year period. Utilization of the federal and state net operating losses may be subject to substantial annual limitation due to the ownership change limitations provided by the IRC Section 382 rules and similar state provisions. In the event the Company has any changes in ownership, net operating losses and research and development credit carryovers could be limited and may expire unutilized. Uncertain Tax Positions          As of December 31, 2015, the Company had unrecognized tax benefits of $1.9 million, none of which would currently affect the Company's effective tax rate if recognized due to the Company's deferred tax assets being fully offset by a valuation allowance. The Company does not anticipate that the amount of unrecognized tax benefits relating to tax positions existing at December 31, 2015 will significantly increase or decrease within the next 12 months.          A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands of dollars):                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="8" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Year Ended December 31, </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2013 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Unrecognized tax benefits, beginning of period </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,571  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>727  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>481  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Gross increases—tax position in prior period </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>548  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>68  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Gross decreases—tax position in prior period </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Gross increases—current period tax position </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>300  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>296  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>178  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Lapse of statue of limitations </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Unrecognized tax benefits, end of period </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,871  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,571  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>727  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> </table></div>          It is the Company's policy to include penalties and interest expense related to income taxes as a component of other income (expense), net, and interest expense, respectively, as necessary. There was no interest expense or penalties related to unrecognized tax benefits recorded through December 31, 2015.          The Company's major tax jurisdictions are the United States and California. All of the Company's tax years will remain open for examination by the Federal and state tax authorities for three and four years, respectively, from the date of utilization of the net operating loss or research and development credit. The Company does not have any tax audits pending. </div><div style="margin-left:0%;margin-right:0%;"> </div><div style="margin-left:0%;margin-right:0%;"></div> </div>

22000

8043000

9707000

11185000

-8697000

-9987000

-11459000

790000

64000

96000

355000

672000

789000

11000

5000

-30000

502000

461000

581000

3348000

1874000

-3546000

683000

1961000

558000

10000000

1517000

1129000

71000

-24000

46000

42000

722000

38000

-304000

-50000

70000

533000

233000

439000

378000

233000

439000

378000

158000

296000

253000

132000

307000

14000

278000

3696000

3767000

<div> <div style="margin-left:0%;margin-right:0%;"></div><div style="margin-left:0%;margin-right:0%;">   Supplies Inventory          Supplies inventory consists of test reagents and other consumables primarily used in the sample collection kits and in cytopathology and GEC test processing and are valued at the lower of cost or market value. Cost is determined using actual costs on a first-in, first-out basis. </div><div style="margin-left:0%;margin-right:0%;"> </div><div style="margin-left:0%;margin-right:0%;"></div> </div>

23465000

24033000

64839000

75285000

17145000

14722000

10000000

15000000

5000000

4923000

5028000

2563000

2437000

4923000

5028000

57218000

-36206000

4070000

77659000

436000

37733000

-1282000

-9010000

-6698000

-19159000

-27632000

-26965000

-25580000

-6674000

-29373000

-200000

-6655000

-7902000

-8142000

-7610000

-33704000

-600000

-9136000

-8945000

-8013000

5000000

45057000

67196000

82969000

-23173000

-29006000

-200000

-33466000

-600000

22130000

1821000

2082000

2026000

2102000

2143000

11956000

840000

852000

1900000

143800000

53800000

1869000

2388000

155000

178000

-2174000

72000

140000

110000

2725000

6916000

1332000

2024000

6165000

0.001

5000000

1218000

1461000

66304000

4877000

37258000

37300000

12945000

5000000

552000

675000

722000

4500000

2300000

2200000

8151000

875000

739000

4199000

197000

788000

1353000

927000

15754000

1046000

6823000

5501000

242000

789000

1353000

1300000

4161000

597000

10314000

744000

P5Y

P3Y

109000

54000

105000

837000

2500000

2269000

2300000

1897000

1900000

7810000

9804000

12796000

70000

118000

603000

-115022000

-148726000

21884000

7476000

38190000

8677000

9838000

12199000

11218000

49503000

11908000

12335000

14042000

75000

603000

118000

75000

12540000

21932000

25293000

1247000

3548000

5602000

P4Y

P10Y

P6Y29D

P5Y

P9Y9M

P7Y8M19D

P6Y29D

P5Y6M

P10Y

P8Y9M

P11M27D

P5M27D

P6Y29D

P5Y6M

P10Y

P7Y11M1D

0.8141

0.7814

0.7854

0.7448

0.5810

0.6882

0.7448

0.8042

0.7786

0.7019

0.7320

0.5357

0.5256

0.6472

0.0211

0.0299

0.0204

0.0220

0.0033

0.0203

0.0229

0.0088

0.0259

0.0166

0.0209

0.0017

0.0155

0.0178

2500

900946

1341252

1058359

750000

5801000

1945279

6.14

P5Y11M16D

4900000

3200000

1800000

337186

100498

1521025

4.19

9.08

5.12

12400000

6511000

3249469

4179521

7.59

8.03

P7Y10M17D

P7Y6M

6511000

4179499

8.03

P7Y6M

1600000

5300000

2.12

2.59

3.07

7.01

0.04

0.85

2.85

10.74

8.72

1.78

2.39

2.40

13.00

13.14

9.66

8.15

7.20

667684

21143313

22523529

27685291

<div> <div style="margin-left:0%;margin-right:0%;"></div><div style="margin-left:0%;margin-right:0%;">   2. Summary of Significant Accounting Policies Basis of Presentation          The Company's financial statements have been prepared in accordance with accounting principles generally accepted in the United States ("GAAP"). The financial statements include the accounts of the Company and its former wholly-owned subsidiary, which was dissolved in June 2015. For periods prior to the subsidiary dissolution, all intercompany accounts and transactions were eliminated in consolidation. Use of Estimates          The preparation of the financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Significant items subject to such estimates include: revenue recognition; contractual allowances; allowance for doubtful accounts; the useful lives of property and equipment; the recoverability of long-lived assets; the estimation of the fair value of intangible assets; the determination of fair value of the Company's common stock prior to the Company's IPO; stock options; preferred stock liability; income tax uncertainties, including a valuation allowance for deferred tax assets; and contingencies. The Company bases these estimates on historical and anticipated results, trends, and various other assumptions that the Company believes are reasonable under the circumstances, including assumptions as to future events. These estimates form the basis for making judgments about the carrying values of assets and liabilities and recorded revenue and expenses that are not readily apparent from other sources. Actual results could differ from those estimates and assumptions. Liquidity          The Company has incurred net losses since its inception and expects to incur additional losses in 2016 and in future years. As of December 31, 2015, the Company had an accumulated deficit of $148.7 million. The Company may never achieve revenue sufficient to offset its expenses. The Company believes its cash and cash equivalents of $39.1 million as of December 31, 2015 and its revenue from sales in 2016 will be sufficient to meet its anticipated cash requirements for at least the next 12 months.          In April 2015, the Company issued and sold 4,907,975 shares of its common stock in a private placement, at a price of $8.15 per share. The Company received $37.3 million in net proceeds, after deducting expenses of $2.7 million.          If the Company is not able to generate revenue to finance its cash requirements, the Company will need to finance future cash needs primarily through public or private equity offerings, debt financings, borrowings or strategic collaborations or licensing arrangements. If the Company is not able to secure additional funding when needed, on acceptable terms, it may have to delay, reduce the scope of or eliminate one or more research and development programs or selling and marketing initiatives which may have a material adverse effect on the Company's business, results of operations, financial condition and/or its ability to fund its scheduled obligations on a timely basis or at all. Concentrations of Credit Risk and Other Risks and Uncertainties          The Company's cash and cash equivalents are deposited with one major financial institution in the United States, as required by the loan and security agreement discussed in Note 8. Deposits in this institution may exceed the amount of insurance provided on such deposits. The Company has not experienced any losses on its deposits of cash and cash equivalents.          Several of the components of the Company's sample collection kit and test reagents are obtained from single-source suppliers. If these single-source suppliers fail to satisfy the Company's requirements on a timely basis, it could suffer delays in being able to deliver its diagnostic solutions, a possible loss of revenue, or incur higher costs, any of which could adversely affect its operating results.          The Company is also subject to credit risk from its accounts receivable related to its sales. The Company generally does not perform evaluations of customers' financial condition and generally does not require collateral.          Through December 31, 2015, all of the Company's revenue have been derived from the sale of Afirma. To date, Afirma has been delivered primarily to physicians in the United States. The Company's third-party payers in excess of 10% of revenue and their related revenue as a percentage of total revenue were as follows:                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="8" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Year Ended December 31, </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2013 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Medicare </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>26  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>26  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>32  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> United Healthcare </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>14  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>18  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>18  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> % </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Aetna </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>9  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>11  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>9  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>49  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>55  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>59  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> % </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> </table></div>          As the number of payers reimbursing for Afirma increases, the percentage of revenue derived from Medicare and other significant third-party payers has changed and will continue to change as a percentage of total revenue.          The Company's significant third-party payers and their related accounts receivable balance at December 31, 2015 and 2014 as a percentage of total accounts receivable are as follows:                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="5" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> December 31, </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Medicare </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>31  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>64  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> United Healthcare </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>25  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>14  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> % </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Aetna </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>23  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>12  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> </tr> </table></div>          No other third-party payer represented more than 10% of the Company's accounts receivable balances as of those dates. Cash Equivalents          Cash equivalents consist of short-term, highly liquid investments with original maturities of three months or less from the date of purchase. Cash equivalents consist of amounts invested in a money market account primarily consisting of U.S. Treasury reserves. Restricted Cash          The Company had deposits of $118,000 as of December 31, 2015 and December 31, 2014, restricted from withdrawal and held by a bank in the form of collateral for irrevocable standby letters of credit totaling $118,000 held as security for the lease of the Company's headquarters and laboratory facilities in South San Francisco that expires March 31, 2016. This restricted cash is included in current assets as of December 31, 2015 and in long-term assets as of December 31, 2014. The Company also had deposits of $603,000 included in long-term assets as of December 31, 2015, restricted from withdrawal and held by a bank in the form of collateral for an irrevocable standby letter of credit held as security for the lease of the Company's new South San Francisco facility signed in April 2015.          The Company reserved $70,000 in cash as of December 31, 2014 to cover liabilities associated with the acquisition of Allegro as discussed in Note 4. This amount was paid in March 2015. Allowance for Doubtful Accounts          The Company estimates an allowance for doubtful accounts against its individual accounts receivable based on estimates of expected reimbursement consistent with historical payment experience in relation to the amounts billed. Bad debt expense is included in general and administrative expense on the Company's statements of operations and comprehensive loss. Accounts receivable are written off against the allowance when there is substantive evidence that the account will not be paid.          The balance of allowance for doubtful accounts as of December 31, 2015 and 2014, including charges to bad debt expense and write-offs, net of recoveries, was as follows (in thousands of dollars):                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="5" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> As of December 31, </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Beginning balance </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>84 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>107 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Charged to expense </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>105 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>54 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Write-offs, net of recoveries </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(72 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(77 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;"> ) </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Ending balance </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>117 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>84 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> </table></div> Supplies Inventory          Supplies inventory consists of test reagents and other consumables primarily used in the sample collection kits and in cytopathology and GEC test processing and are valued at the lower of cost or market value. Cost is determined using actual costs on a first-in, first-out basis. Property and Equipment          Property and equipment are stated at cost less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful lives of the assets, generally between three and five years. Leasehold improvements are amortized using the straight-line method over the shorter of the estimated useful life of the asset or the term of the lease. Maintenance and repairs are charged to expense as incurred, and improvements and betterments are capitalized. When assets are retired or otherwise disposed of, the cost and accumulated depreciation are removed from the balance sheet and any resulting gain or loss is reflected in the statements of operations and comprehensive loss in the period realized. Internal-use Software          The Company capitalizes costs incurred in the application development stage to design and implement the software used in the tracking and reporting of laboratory activity. Costs incurred in the development of application software are capitalized and amortized over an estimated useful life of three years on a straight-line basis. The total cost, accumulated depreciation and net book value of internal-use software was $1.3 million, $534,000 and $744,000, respectively, as of December 31, 2015, and was $927,000, $330,000 and $597,000, respectively, as of December 31, 2014, and are included in property and equipment in the Company's balance sheets. During the years ended December 31, 2015 and 2014, the Company capitalized $352,000 and $445,000, respectively, of software development costs. Amortization expense totaled $204,000, $135,000 and $108,000 in the years ended December 31, 2015, 2014 and 2013, respectively. Business Combination          The Company accounts for acquisitions using the acquisition method of accounting which requires the recognition of tangible and identifiable intangible assets acquired and liabilities assumed at their estimated fair values as of the business combination date. The Company allocates any excess purchase price over the estimated fair value assigned to the net tangible and identifiable intangible assets acquired and liabilities assumed to goodwill. Transaction costs are expensed as incurred in general and administrative expenses. Results of operations and cash flows of acquired companies are included in the Company's operating results from the date of acquisition. Finite-lived Intangible Assets          Finite-lived intangible assets relates to intangible assets reclassified from indefinite-lived intangible assets, following the launch of Percepta in April 2015. The Company amortizes finite-lived intangible assets using the straight-line method over their estimated useful life. The estimated useful life of 15 years was used for the intangible asset related to the Percepta test based on management's estimate of product life, product life of other diagnostic tests and patent life. The Company tests this finite-lived intangible asset for impairment when events or circumstances indicate a reduction in the fair value below its carrying amount. There was no impairment for the year ended December 31, 2015. Indefinite-lived Intangible Assets—In-process Research and Development          The Company's indefinite-lived intangible assets are comprised of acquired in-process research and development ("IPR&D"). The fair value of IPR&D acquired through a business combination is capitalized as an indefinite-lived intangible asset until the completion or abandonment of the related research and development activities. When research and development is complete, the associated assets are amortized on a straight-line basis over their estimated useful lives. IPR&D is tested for impairment annually or more frequently if events or circumstances indicate that the fair value may be below the carrying value of the asset. The Company recognizes an impairment loss when the total of estimated future undiscounted cash flows expected to result from the use of the asset and its eventual disposition are less than its carrying amount. Impairment, if any, would be assessed using discounted cash flows or other appropriate measures of fair value. There were no impairments for the years ended December 31, 2015 and 2014. Goodwill          Goodwill, derived from the Company's acquisition of Allegro, is reviewed for impairment on an annual basis or more frequently if events or circumstances indicate that it may be impaired. The Company's goodwill evaluation is based on both qualitative and quantitative assessments regarding the fair value of goodwill relative to its carrying value. The Company has determined that it operates in a single segment and has a single reporting unit associated with the development and commercialization of diagnostic products. In the event the Company determines that it is more likely than not the carrying value of the reporting unit is higher than its fair value, quantitative testing is performed comparing recorded values to estimated fair values. If impairment is present, the impairment loss is measured as the excess of the recorded goodwill over its implied fair value. The Company performs its annual evaluation of goodwill during the fourth quarter of each fiscal year. There were no impairments for the years ended December 31, 2015 and 2014. Derivative Liability          The Company accounts for derivative financial instruments as either equity or liabilities based upon the characteristics and provisions of each instrument. The Company recorded the preferred stock liability incurred in connection with its Series C convertible preferred stock and the preferred stock warrant liability related to the issuance of a warrant for Series C convertible preferred stock, each as a derivative financial instrument liability at their fair value on the date of issuance, and the Company re-measured them on each subsequent balance sheet date. The changes in fair value were recognized as a gain or loss from the adjustment to other income (expense), net, in the statements of operations and comprehensive loss. The Company estimated the fair value of this liability using option-pricing models that include assumptions for future financings, expected volatility, expected life, yield and risk-free interest rate. The preferred stock liability was extinguished in June 2013. The warrant to purchase Series C convertible preferred stock was converted into a warrant to purchase the Company's common stock as of the closing of its IPO and was exercised through a cashless exercise in March 2014. Bonus Accruals          The Company accrues for liabilities under discretionary employee and executive bonus plans. These estimated compensation liabilities are based on progress against corporate objectives approved by the Board of Directors, compensation levels of eligible individuals, and target bonus percentage levels. The Board of Directors and the Compensation Committee of the Board of Directors review and evaluate the performance against these objectives and ultimately determine what discretionary payments are made. The Company accrued $2.1 million and $1.1 million as of December 31, 2015 and 2014, respectively, for liabilities associated with these employee and executive bonus plans which are included in accrued liabilities in the Company's balance sheets. Fair Value of Financial Instruments          The carrying amounts of certain financial instruments including cash and cash equivalents, accounts receivable, prepaid expenses and other current assets, accounts payable and accrued liabilities approximate fair value due to their relatively short maturities. Revenue Recognition          The Company recognizes revenue in accordance with the provision of ASC 954-605, Health Care Entities—Revenue Recognition. The Company's revenue is generated from the provision of diagnostic services using the Afirma solution and the service is completed upon the delivery of test results to the prescribing physician, at which time the Company bills for the service. The Company recognizes revenue related to billings for Medicare and commercial payers on an accrual basis, net of contractual and other adjustments, when amounts that will ultimately be realized can be estimated. Contractual and other adjustments represent the difference between the list price (the billing rate) and the estimated reimbursement rate for each payer. Upon ultimate collection, the amount received from Medicare and commercial payers where reimbursement was estimated is compared to previous estimates and, if necessary, the contractual allowance is adjusted accordingly. Until a contract has been negotiated with a commercial payer or governmental program, the Afirma solution may or may not be covered by these entities' existing reimbursement policies. In addition, patients do not enter into direct agreements with the Company that commit them to pay any portion of the cost of the tests in the event that their insurance declines to reimburse the Company. In the absence of an agreement with the patient or other clearly enforceable legal right to demand payment from the patient, the related revenue is only recognized upon the earlier of payment notification, if applicable, or cash receipt.          The estimates of amounts that will ultimately be realized requires significant judgment by management. Some patients have out-of-pocket costs for amounts not covered by their insurance carrier, and the Company may bill the patient directly for these amounts in the form of co-payments and co-insurance in accordance with their insurance carrier and health plans. Some payers may not cover the Company's GEC as ordered by the prescribing physician under their reimbursement policies. The Company pursues reimbursement from such patients on a case-by-case basis. In the absence of contracted reimbursement coverage or the ability to estimate the amount that will ultimately be realized for the Company's services, revenue is recognized upon the earlier of receipt of third-party payer notification of payment or when cash is received.          Revenue recognized when cash is received and on an accrual basis for the years ended December 31, 2015, 2014 and 2013 was as follows (in thousands of dollars):                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="8" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Year Ended December 31, </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2013 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Revenue recognized when cash is received </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>22,460  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>25,645  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>14,586  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Revenue recognized on an accrual basis </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>27,043  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>12,545  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>7,298  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Total </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>49,503  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>38,190  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>21,884  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> </table></div> Cost of Revenue          Cost of revenue is expensed as incurred and includes material and service costs, cytopathology testing services performed by a third-party pathology group, stock-based compensation expense, direct labor costs, equipment and infrastructure expenses associated with testing samples, shipping charges to transport samples, and allocated overhead including rent, information technology, equipment depreciation and utilities. Research and Development          Research and development costs are charged to operations as incurred. Research and development costs include payroll and personnel-related expenses, stock-based compensation expense, prototype materials, laboratory supplies, consulting costs, costs associated with setting up and conducting clinical studies at domestic and international sites, and allocated overhead including rent, information technology, equipment depreciation and utilities. Income Taxes          The Company accounts for income taxes under the liability method. Under this method, deferred tax assets and liabilities are determined based on the difference between the financial statement and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to affect taxable income. Valuation allowances are established when necessary to reduce deferred tax assets to the amounts expected to be realized.          The Company assesses all material positions taken in any income tax return, including all significant uncertain positions, in all tax years that are still subject to assessment or challenge by relevant taxing authorities. The Company's assessment of an uncertain tax position begins with the initial determination of the position's sustainability and is measured at the largest amount of benefit that is more-likely-than-not of being realized upon ultimate settlement. As of each balance sheet date, unresolved uncertain tax positions must be reassessed, and the Company will determine whether (i) the factors underlying the sustainability assertion have changed and (ii) the amount of the recognized tax benefit is still appropriate. The recognition and measurement of tax benefits requires significant judgment. Judgments concerning the recognition and measurement of a tax benefit may change as new information becomes available. Stock-based Compensation          Stock-based compensation expense for equity instruments issued to employees is measured based on the grant-date fair value of the awards. The fair value of each employee stock option is estimated on the date of grant using the Black-Scholes option-pricing model. The Company recognizes compensation costs on a straight-line basis for all employee stock-based compensation awards that are expected to vest over the requisite service period of the awards, which is generally the awards' vesting period. Forfeitures are required to be estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates.          Equity awards issued to non-employees are valued using the Black-Scholes option-pricing model and are subject to re-measurement as the underlying equity awards vest. Net Loss per Common Share          Basic net loss per common share is calculated by dividing net loss attributable to common stockholders by the weighted-average number of common shares outstanding during the period, without consideration of common stock equivalents. Diluted net loss per common share is computed by dividing net loss attributable to common stockholders by the weighted-average number of common share equivalents outstanding for the period determined using the treasury stock method. Potentially dilutive securities consisting of options and warrants to purchase common stock are considered to be common stock equivalents and were excluded from the calculation of diluted net loss per common share because their effect would be anti-dilutive for all periods presented. Recent Accounting Pronouncements          In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers, requiring an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The updated standard will replace most existing revenue recognition guidance in GAAP when it becomes effective and permits the use of either the retrospective or cumulative effect transition method. Adoption is permitted as early as the first quarter of 2017 and is required by the first quarter of 2018. The Company has not yet selected a transition method and are currently evaluating the potential effect of the updated standard on its financial statements.          In August 2014, FASB issued ASU No. 2014-15, Presentation of Financial Statements Going Concern—Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern. The amendments require management to assess an entity's ability to continue as a going concern by incorporating and expanding upon certain principles that are currently in U.S. auditing standards. Specifically, the amendments: (1) provide a definition of the term substantial doubt; (2) require an evaluation every reporting period including interim periods; (3) provide principles for considering the mitigating effect of management's plans; (4) require certain disclosures when substantial doubt is alleviated as a result of consideration of management's plans; (5) require an express statement and other disclosures when substantial doubt is not alleviated; and (6) require an assessment for a period of one year after the date that the financial statements are issued (or available to be issued). ASU 2014-15 will be effective for annual periods ending after December 15, 2016 and interim periods within annual periods beginning after December 15, 2016 with early adoption permitted. ASU 2014-15 will be effective for the Company beginning with its annual report for fiscal 2016 and interim periods thereafter. The Company does not anticipate that the adoption of this ASU will have a significant impact on its financial statements.          In April 2015, the FASB issued ASU No. 2015-03, Simplifying the Presentation of Debt Issuance Costs, to require debt issuance costs to be presented as an offset against debt outstanding. The update does not change current guidance on the recognition and measurement of debt issuance costs. The ASU is effective for interim and annual periods beginning after December 15, 2015. Adoption of the ASU is retrospective to each prior period presented. The Company does not anticipate that the adoption of this ASU will have a significant impact on its balance sheet.          In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes, related to balance sheet classification of deferred taxes. The ASU requires that deferred tax assets and liabilities be classified as noncurrent in the statement of financial position, thereby simplifying the current guidance that requires an entity to separate deferred assets and liabilities into current and noncurrent amounts. The ASU will be effective for the Company beginning in the first quarter of fiscal year 2018 though early adoption is permitted. The Company has early-adopted the ASU as of December 31, 2015 and its statement of financial position as of this date reflects the revised classification of current deferred tax assets and liabilities as noncurrent. The Company has early-adopted this ASU prospectively and prior periods have not been retrospectively adjusted. There is no other impact on the Company's financial statements of early-adopting the ASU. </div><div style="margin-left:0%;margin-right:0%;"> </div><div style="margin-left:0%;margin-right:0%;"></div> </div>

-58471000

1597000

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402100

253787

10078000

10077000

1000

79022000

79007000

15000

-79022000

59156000

59151000

5000

552000

675000

674000

1000

722000

2700000

2100000

63372000

53084507

481000

727000

1571000

1871000

178000

296000

300000

68000

548000

8100000

10600000

11700000

4158664

21148342

21639374

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22508250

22539723

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-3000 -3000 3000 259000 259000 261000 261000 3000 1041000 1041000 3388000 3388000 5302000 5302000 190000 190000 206000 206000 160000 160000 110000 110000 P6M P12M 1 2700000 964377 7000 16000000 24801 24801 24801 24801 8600000 12000000 7300000 P4Y 0.50 0.40 0.32 0.15 0.25 500000 40 5 6000000 2700000 3300000 2100000 2100000 P5Y 1700000 4642000 2507000 2742000 <div> <div style="margin-left:0%;margin-right:0%;"></div><div style="margin-left:0%;margin-right:0%;">   Concentrations of Credit Risk and Other Risks and Uncertainties          The Company's cash and cash equivalents are deposited with one major financial institution in the United States, as required by the loan and security agreement discussed in Note 8. Deposits in this institution may exceed the amount of insurance provided on such deposits. The Company has not experienced any losses on its deposits of cash and cash equivalents.          Several of the components of the Company's sample collection kit and test reagents are obtained from single-source suppliers. If these single-source suppliers fail to satisfy the Company's requirements on a timely basis, it could suffer delays in being able to deliver its diagnostic solutions, a possible loss of revenue, or incur higher costs, any of which could adversely affect its operating results.          The Company is also subject to credit risk from its accounts receivable related to its sales. The Company generally does not perform evaluations of customers' financial condition and generally does not require collateral.          Through December 31, 2015, all of the Company's revenue have been derived from the sale of Afirma. To date, Afirma has been delivered primarily to physicians in the United States. The Company's third-party payers in excess of 10% of revenue and their related revenue as a percentage of total revenue were as follows:                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="8" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Year Ended December 31, </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2013 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Medicare </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>26  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>26  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>32  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> United Healthcare </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>14  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>18  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>18  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> % </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Aetna </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>9  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>11  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>9  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>49  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>55  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>59  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> % </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> </table></div>          As the number of payers reimbursing for Afirma increases, the percentage of revenue derived from Medicare and other significant third-party payers has changed and will continue to change as a percentage of total revenue.          The Company's significant third-party payers and their related accounts receivable balance at December 31, 2015 and 2014 as a percentage of total accounts receivable are as follows:                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="5" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> December 31, </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Medicare </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>31  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>64  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> United Healthcare </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>25  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>14  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> % </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Aetna </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>23  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>12  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> </tr> </table></div>          No other third-party payer represented more than 10% of the Company's accounts receivable balances as of those dates. </div><div style="margin-left:0%;margin-right:0%;"> </div><div style="margin-left:0%;margin-right:0%;"></div> </div> 261000 53.00 1.89 82000 225000 110000 237500 0.0475 42000 42000 81000 81000 79000 79000 30 24 0.0075 0.000 0.0225 0.0200 0.0150 0.010 P18M P24M 75000 P48M 45000 705000 3381000 4698000 1792000 995000 330000 1455000 1916000 2497000 2653000 1.00 1.00 -261000 175000 800000 1100000 P3Y P4Y 3862000 355000 4463000 16000000 129000 2700000 1300000 59000 5003000 5082000 1 2 3 2500000 500000 1600000 -49000 -86000 -90000 110000 247000 7019000 129000 4300000 2700000 59200000 40000000 7298000 12545000 27043000 14586000 25645000 22460000 <div> <div style="margin-left:0%;margin-right:0%;"></div><div style="margin-left:0%;margin-right:0%;">                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="5" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> December 31, </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Options issued and outstanding </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4,179,521  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>3,249,469  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Options available for grant under stock option plans </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,058,359  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,341,252  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Common Stock available for the Employee Stock Purchase Plan </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>750,000  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Total </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>5,987,880  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4,590,721  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> </table></div>   </div><div style="margin-left:0%;margin-right:0%;"> </div><div style="margin-left:0%;margin-right:0%;"></div> </div> <div> <div style="margin-left:0%;margin-right:0%;"></div><div style="margin-left:0%;margin-right:0%;">          The acquisition consideration was comprised of (in thousands of dollars):                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Stock </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>10,078  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Cash </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>2,725  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Payment of outstanding indebtedness </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4,290  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Total acquisition consideration </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>17,093  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> </table></div>   </div><div style="margin-left:0%;margin-right:0%;"> </div><div style="margin-left:0%;margin-right:0%;"></div> </div> <div> <div style="margin-left:0%;margin-right:0%;"></div><div style="margin-left:0%;margin-right:0%;">          Revenue recognized when cash is received and on an accrual basis for the years ended December 31, 2015, 2014 and 2013 was as follows (in thousands of dollars):                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="8" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Year Ended December 31, </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2013 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Revenue recognized when cash is received </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>22,460  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>25,645  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>14,586  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Revenue recognized on an accrual basis </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>27,043  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>12,545  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>7,298  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Total </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>49,503  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>38,190  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>21,884  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> </table></div>   </div><div style="margin-left:0%;margin-right:0%;"> </div><div style="margin-left:0%;margin-right:0%;"></div> </div> P12M 0.75 P3Y 0.25 0.25 25000 P12M 10000 1.18 2.00 35000 0.1 P6M P6M 1.10 P5Y 259000 4907975 4907975 37258000 37253000 5000 6904761 13739 13739 12997000 187000 <div> <div style="margin-left:0%;margin-right:0%;"></div><div style="margin-left:0%;margin-right:0%;">   10. Convertible Preferred Stock          In November 2012, the Company recorded a preferred stock liability as the investors received the right to purchase from the Company, on the same terms, additional shares of Series C convertible preferred stock, in a second tranche. As the investors held a majority of the board seats, the decision to complete the second tranche was deemed to be outside the control of the Company. The preferred stock liability was valued using the option-pricing method with the following assumptions: 100% probability of success of the second tranche, fair value of Series C preferred stock of $1.78, a term of 0.67 years and expected volatility of 44%. This resulted in an initial fair value of $0.9 million for the Company's obligation to sell the convertible preferred stock. At December 31, 2012, the Company revalued the preferred stock liability to $0.6 million, and recorded the $0.3 million valuation decrease to other income (expense), net, in the Company's statements of operations and comprehensive loss. In June 2013, the Company revalued the preferred stock liability to $2.7 million and recorded the $2.1 million valuation increase to other income (expense), net, in the Company's statements of operations and comprehensive loss. In June 2013, the $2.7 million liability was settled upon the issuance of the second tranche of Series C convertible preferred stock and was reclassified to additional paid-in-capital in the Company's balance sheets.          On November 4, 2013, the Company completed its IPO. In connection with the IPO, 59,989,268 outstanding shares of convertible preferred stock were automatically converted into 14,997,312 shares of common stock. </div><div style="margin-left:0%;margin-right:0%;"> </div><div style="margin-left:0%;margin-right:0%;"></div> </div> 3300000 3200000 4000000 4700000 2653000 4600000 1 <div> <div style="margin-left:0%;margin-right:0%;"></div><div style="margin-left:0%;margin-right:0%;">   9. Convertible Preferred Stock Warrant          In June 2013, in conjunction with the execution of the Original Loan, as discussed in Note 8, the Company issued to the lender a warrant to purchase up to 49,602 shares of Series C convertible preferred stock with an exercise price of $7.56 per share. Upon the draw-down of the $5.0 million term loan, the related warrant became exercisable for 24,801 shares. In November 2013, in connection with the Company's IPO, the warrant automatically became exercisable for 24,801 shares at an exercise price of $7.56 per share. The lender exercised the warrant with respect to 24,801 shares through a cashless exercise in March 2014, resulting in the issuance of 13,739 shares of the Company's common stock. The fair value of the then currently exercisable portion of the warrant in the amount of $175,000 was recorded as a preferred stock warrant liability upon issuance and was subject to re-measurement at each reporting period up to the closing date of the IPO when the Series C preferred stock converted into common stock. The fair value of the warrant upon issuance was calculated using the Black-Scholes option-pricing model with the following assumptions: Series C preferred stock value of $2.40 per share, contractual term of 7.3 years, risk-free interest rate of 2.1%, expected volatility of 73.7%, and expected dividend yield of 0%. Just prior to the closing of the IPO, the fair value of the warrant was approximately $261,000, and was calculated using the Black-Scholes option-pricing model with the following assumptions: Series C preferred stock value of $13.14 per share, contractual term of 7.0 years, risk-free interest rate of 2.0%, expected volatility of 81.4%, and expected dividend yield of 0%. The change in the fair value of approximately $86,000 was reported as an expense for the year ended December 31, 2013 and was included in other income (expense), net, in the statements of operations and comprehensive loss. The warrant was converted into a warrant to purchase common stock upon the completion of the IPO in 2013, and was reclassified to additional paid-in-capital on the Company's balance sheet. </div><div style="margin-left:0%;margin-right:0%;"> </div><div style="margin-left:0%;margin-right:0%;"></div> </div>