Deferred Tax Assets Deferred Income Current Genzyme co-promotion agreement Represents the amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from current deferred income. Deferred Tax Assets Accruals Depreciation and Deferred Rent Current Accruals and deferred rent Represents the amount before allocation of valuation allowances of deferred tax asset attributable to current accruals, depreciation and deferred rent. Components of Deferred Tax Liabilities Current [Abstract] Deferred tax liabilities: Deferred Tax Assets Deferred Income Non Current Represents the amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from non-current deferred income. Genzyme co-promotion agreement Deferred Tax Assets Accruals Depreciation and Deferred Rent Non Current Accruals, depreciation and deferred rent Represents the amount before allocation of valuation allowances of deferred tax asset attributable to non-current accruals, depreciation and deferred rent. Components of Deferred Tax Liabilities Non Current [Abstract] Deferred tax liabilities: Components of Deferred Tax Assets Non Current [Abstract] Non-current deferred tax assets: Outside Director Serving as Member of Board of Directors for at Least Six Months [Member] Outside director serving as a member of Board of Directors for at least six months Represents information pertaining to outside director serving as a member of Board of Directors for at least six months. Share Based Compensation Arrangement by Share Based Payment Award Award Percentage Vesting on Monthly Basis Percentage of award granted which vests on a monthly basis Percentage of award granted which vests on a monthly basis. Share Based Compensation Arrangement by Share Based Payment Award Award Period Over which Vesting Will be on Monthly Basis Period over which remaining shares will vest on a monthly basis Represents the period over which grants of awards made will vest on a monthly basis. Amendment Description Share Based Compensation Arrangement by Share based Payment Award Period for Which Director Has to Serve as Board of Director to Receive Grant to Purchase Shares Period for which director has to serve as board of director to receive grant to purchase shares Represents the period for which director has to serve as board of director to receive grant to purchase shares. Amendment Flag Share Based Compensation Arrangement by Share Based Payment Award Award Expiration Period After Termination Expiration period after termination of service Expiration period of award after termination of service, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Professional licensure fees paid to TCP Professional Licensure Fees Cost of professional licensure fees directly related to generating revenues. Proceeds from Reimbursed Rent Reimbursed rent Proceeds from reimbursed rent and related operating costs for shared leased facilities. Tenant improvement allowances Tenant Improvement Allowance Amount of tenant improvement allowance granted by the lessor to a tenant under the terms of the agreement. Class of Warrant or Right Number of Securities for which Warrants Became Exercisable Number of shares for which warrant became exercisable Represents the number of securities for which warrants became exercisable. Common Stock Warrants [Member] Common Stock Warrants Shares of common stock issuable upon exercise of warrants Represents the security that gives the holder the right to purchase shares of common stock in accordance with the terms of the instrument, usually upon payment of a specified amount. Underwriting Discounts and Commissions Underwriting discounts and commissions Represents the amount of underwriting discounts and commissions payable by the entity. Class of Warrant or Right Number of Securities for which Warrants will Become Exercisable in Event of Conversion of Preferred Stock Into Common Stock Number of shares for which warrant became exercisable Represents the number of securities for which warrants will become exercisable in the event of conversion of outstanding convertible preferred stock into common stock. Preferred Stock Number of Series Number of series in which preferred stock may be issued. Number of series in which preferred stock may be issued Exercise Price Dollars 12.12 [Member] $12.12 Represents the exercise price of 12.12 dollars per share. Schedule of Common Stock Capital Shares Reserved for Future Issuance [Table Text Block] Schedule of reserved shares of common stock for issuance Tabular disclosure of number of common shares reserved for future issuance. Voting Rights for Each Share of Stock Number of votes for each share of stock Represents the number of votes for each share of stock. Series A Convertible Preferred Stock [Member] Series A convertible preferred stock Represents information pertaining to the series A convertible preferred stock. Series A Series B Convertible Preferred Stock [Member] Series B convertible preferred stock Represents information pertaining to the series B convertible preferred stock. Series B Schedule of Depreciation and Amortization Expense [Table Text Block] Schedule of depreciation and amortization expense recorded in the statements of operations and comprehensive loss Tabular disclosure of depreciation and amortization expense recorded in the statements of operations and comprehensive loss. Stock Plan 2008 [Member] 2008 Plan Represents information pertaining to the 2008 Stock Plan (the 2008 Plan). Current Fiscal Year End Date Award Type [Axis] 2013 Plan Represents information pertaining to the 2013 Stock Incentive Plan (the 2013 Plan). Stock Incentive Plan 2013 [Member] Share Based Compensation Arrangement by Share Based Payment Award Term of Options Granted to Employees Who Owned Specified Percentage of Class of Stock Term of options granted to a person owning stock representing more than 10% of voting power of all classes of stock Represents the term of options granted to persons owning stock representing specified percentage of voting power of all classes of stock, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Share based Compensation Arrangement by Share based Payment Award Purchase Price of Stock Percentage for Grants to Persons Who Owned Specified Percentage of Class of Stock Option price as a percentage of estimated fair value of shares on date of grant to a person owning stock representing more than 10% of voting power of all classes of stock Option price as a percentage of estimated fair value of shares on date of grant to a person owning stock representing specified percentage of voting power of all classes of stock. Share Based Compensation Arrangement by Share Based Payment Award Options Weighted Average Remaining Contractual Life [Abstract] Weighted Average Remaining Contractual Life Excess Payment Related to Testing and Evaluation Services Excess payment included in accounts payable Represents the amount of excess payment related to testing and evaluation services included in accounts payable as of balance sheet date. Purchase Obligation [Abstract] Volume Purchase Agreement Options An arrangement whereby an employee or non-employee is entitled to receive in the future, subject to vesting and other restrictions, number of shares in the entity at a specified price, as defined in the agreement. Shares of common stock subject to outstanding options Employee and non Employee Stock Option [Member] Research and development credit Represents the amount before allocation of valuation allowances of deferred tax asset attributable to deductible research and development tax credit carryforwards. Deferred Tax Assets Tax Credit Carryforwards Research and Development Income Tax Examination Period Income tax examination period Period which will remain open for examination by tax authorities, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Represents the period for which research tax credit is extended in respect of qualified research expenditures incurred through the end of specified period. Income Taxes Period for which Research Tax Credit Extended for Qualified Research Expenditures Incurred Through End of Specified Period Period for which research tax credit extended for qualified research expenditures incurred through the end of 2013 $2.68 Represents the exercise price of 2.68 dollars per share. Exercise Price Dollars 2.68 [Member] Document Period End Date Exercise Price Dollars 4.00 [Member] $4.00 Represents the exercise price of 4.00 dollars per share. Represents the exercise price of 6.04 dollars per share. Exercise Price Dollars 6.04 [Member] $6.04 Class of Warrant or Right Potential Number of Aggregate Securities Exercisable Aggregate number of shares for which warrant becomes exercisable if Company draws down second term loan (in shares) Number of securities into which each warrant or right may be become exercisable . For example, but not limited to, each warrant may be converted into two shares. Number of countries outside United States in which marketing authorization is obtained Represents the number of countries outside United States in which marketing authorization is obtained under the agreement. Collaborative Arrangement Number of Countries Outside United States in which Marketing Authorization is Obtained Additional payments that may be received Represents the additional payments that may be received under the agreement. Collaborative Arrangement Additional Payments That May Be Received Collaborative Arrangement Additional Payments that may be Received for Each Country Outside United States In which Entity Obtains Marketing Authorization and Achieves Specified Level of Reimbursement Additional payments that may be received for each country outside of the United States in which the company obtains marketing authorization and achieves a specified level of reimbursement Represents the additional payments that may be received for each country outside of the United States in which the entity obtains marketing authorization and achieves a specified level of reimbursement under the agreement. Number of countries outside United States for which additional payments may be received Represents the number of countries outside United States for which additional payments may be received under the agreement. Collaborative Arrangement Number of Countries Outside United States for which Additional Payments May be Received Collaborative Arrangement Percentage of Cash Receipts of Co-Promotion Fees for Remaining Periods Represents the percentage of cash receipts of co-promotion fees to be received by the co-promoter for the remaining periods under the agreement. Percentage of cash receipts of co-promotion fees received by co-promoter for remaining periods Collaborative Arrangement Maximum Amount to be Spent by Co Promoter for Qualifying Clinical Development Activities in Countries that Require Additional Testing for Approval Maximum amount to be spent by co-promoter for qualifying clinical development activities in countries that require additional testing Represents the maximum amount to be spent by co-promoter for qualifying clinical development activities in countries that require additional testing for approval under the agreement. Entity [Domain] Collaborative Arrangement Co Promotion Fee Amortization Period Amortization period of co-promotion fee Represents the amortization period of co-promotion fee. Convertible Preferred Stock Warrant Represents the security that gives the holder the right to purchase shares of convertible preferred stock in accordance with the terms of the instrument, usually upon payment of a specified amount. Convertible Preferred Stock Warrants [Member] Probability of success of the second tranche (as a percent) Represents the percentage of likelihood that the second tranche of convertible preferred stock will succeed, used as an input to measure fair value. Fair Value Assumptions Probability of Success of Second Tranche of Convertible Preferred Stock Arrangements and Non-arrangement Transactions [Domain] Number of installments Represents the number of installments for payment of the debt. Debt Instrument Number of Installments Represents the period after the date of borrowing in which the debt is repayable under the agreement. Debt Instrument Period after which Debt is Repayable Period after which debt is repayable Represents the percentage of prepayment penalties for prepayment within one year of the loan origination. Debt Instrument Penalty Percentage on Prepayment within One Year of Origination Prepayment penalties for prepayment within one year of the loan origination (as a percent) Debt Instrument Penalty Percentage on Prepayment within Two Years of Origination Prepayment penalties for prepayment within two years of the loan origination (as a percent) Represents the percentage of prepayment penalties for prepayment within two years of the loan origination. Prepayment penalties for prepayment after two years of the loan origination (as a percent) Represents the percentage of prepayment penalties for prepayment after two years of the loan origination. Debt Instrument Penalty Percentage on Prepayment after Two Years of Origination Debt Instrument Remaining Discount Amortization Period Amortization period of debt discount Represents the remaining amortization period for discount on the debt. Accrued Consulting Fees Current Accrued consulting fees Carrying value, as of the balance sheet date, of obligations incurred through that date and payable for consulting fees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Series C Series C Convertible Preferred Stock [Member] Series C convertible preferred stock Represents information pertaining to the series C convertible preferred stock. Class of Warrant or Right Number of Securities for which Warrants may become Exercisable Remaining number of shares for which warrant may become exercisable Represents the number of securities for which warrants may become exercisable. Warrants and Rights Note Disclosure [Text Block] Convertible Preferred Stock Warrant Disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Represents term loan one of the reporting entity. Term Loan One [Member] Term loan Weighted Average Basic and Diluted Shares Outstanding Pro Forma Shares used in computing pro forma net loss per common share, basic and diluted Represents the weighted average number of shares (units) outstanding in the calculation of pro forma basic and diluted earnings per share (earnings per unit), which is commonly presented in initial public offerings based on the terms of the offering. Stock-based compensation The aggregate amount of noncash, equity-based employee remuneration for non-bonus related compensation. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Share Based Compensation Non Bonus Related Equity-based compensation The aggregate amount of noncash, equity-based employee remuneration for bonus related compensation. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Share Based Compensation Bonus Related Increase (Decrease) in Accrued Liabilities and Deferred Rent Accrued liabilities and deferred rent The increase (decrease) during the reporting period in the amount of expenses incurred but not yet paid and deferred rent. Thyroid Cytology Partners An arrangement whereby an employee or non-employee is entitled to receive in the future, subject to vesting and other restrictions, a number of shares in the entity at a specified price, as defined in the agreement, excluding options granted as bonus related compensation. Employee and Non Employee Stock Option Excluding Bonus Compensation [Member] Stock-based Compensation An arrangement whereby an employee is entitled to receive in the future, subject to vesting and other restrictions, a number of shares in the entity at a specified price, as defined in the agreement, as bonus related compensation. Employee Stock Option Bonus Compensation [Member] Equity-based Compensation Concentrations of Credit and Other Risks and Uncertainties [Policy Text Block] Concentrations of Credit Risk and Other Risks and Uncertainties Disclosure of accounting policy for concentrations of credit risk and other risks and uncertainties. Medicare Represents information pertaining to Medicare, a significant third-party payer. Medicare [Member] Aetna [Member] Aetna Represents information pertaining to Aetna, a significant third-party payer. United Healthcare [Member] United Healthcare Represents information pertaining to United Healthcare, a significant third-party payer. Number of Major Financial Institutions with which Cash and Cash Equivalents Deposited Number of major financial institutions with which the company's cash and cash equivalents are deposited Represents the number of major financial institutions, with which cash and cash equivalents are deposited by the entity. Allowance for Doubtful Accounts [Abstract] Allowance for Doubtful Accounts Temporary Equity Disclosure [Text Block] Convertible Preferred Stock Disclosure of temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Temporary Equity Number of Shares that May be Sold in Additional Closings Number of shares that may be sold in additional closing Represents the number of shares that may be sold in additional closings under the agreement. Number of additional closings Represents the number of additional closings. Number of Additional Closings Temporary Equity Stock Issued During Period Shares Number of shares issued Represents the number of shares classified as temporary equity issued during the period. Expenses for cytopathology testing and evaluation services Testing and evaluation service costs directly related to generating revenues. Testing and Evaluation Services Expense Represents the amount of end of term payment of debt. Debt Instrument End of Term Payment Amount Amount of end of term payment Represents the end of term payment as a percentage of total outstanding principal balance of debt. Debt Instrument End of Term Payment as Percentage of Total Outstanding Principal End of term payment as a percentage of total outstanding principal balance Share Based Compensation Arrangement by Share Based Payment Award Number of Shares Available for Grant [Roll Forward] Shares Available for Grant The weighted average grant-date fair value of options exercised during the reporting period. Share Based Compensation Arrangement by Share Based Payment Award Options Exercises in Period Weighted Average Grant Date Fair Value Weighted average fair value of stock options exercised (in dollars per share) Share Based Compensation Arrangement by Share Based Payment Award Options Aggregate Intrinsic Value [Abstract] Aggregate Intrinsic Value Genzyme Co-promotion Agreement Genzyme Represents information pertaining to Genzyme Corporation, a co-promoter. Genzyme Corporation [Member] Document and Entity Information Represents the period of prior notice for termination of the agreement. Collaborative Arrangement Prior Notice Period for Termination of Agreement Prior notice period for termination of agreement Employee Stock Option Excluding Bonus Compensation [Member] Stock-based Compensation, employee An arrangement whereby an employee is entitled to receive in the future, subject to vesting and other restrictions, a number of shares in the entity at a specified price, as defined in the agreement, excluding options granted as bonus compensation. Stock-based Compensation, employees and directors Non Employee Stock Option [Member] Stock-based Compensation, non-employees An arrangement whereby a non-employee is entitled to receive in the future, subject to vesting and other restrictions, a number of shares in the entity at a specified price, as defined in the agreement. Equity-based Compensation, executive bonuses An arrangement whereby an employee is entitled to receive in the future, subject to vesting and other restrictions, a number of shares in the entity at a specified price, as defined in the agreement, as annual bonus related compensation. Employee Stock Option Annual Bonus Compensation [Member] Entity Well-known Seasoned Issuer Employee Stock Option Performance Bonus Compensation [Member] An arrangement whereby an employee is entitled to receive in the future, subject to vesting and other restrictions, a number of shares in the entity at a specified price, as defined in the agreement, as bonus compensation related to specified performance. Equity-based Compensation, incentive stock options Entity Voluntary Filers Represents the percentage of cash receipts of co-promotion fees received by the co-promoter under the agreement. Collaborative Arrangement Percentage of Cash Receipts of Co-Promotion Fees Percentage of cash receipts of co-promotion fees received by co-promoter Entity Current Reporting Status Exercise Price Dollars 0.08 [Member] $0.08 Represents the exercise price of 0.08 dollars per share. Entity Filer Category Exercise Price Dollars 0.80 [Member] $0.80 Represents the exercise price of 0.80 dollars per share. Entity Public Float $2.36 Represents the exercise price of 2.36 dollars per share. Exercise Price Dollars 2.36 [Member] Entity Registrant Name Exercise Price Dollars 2.40 [Member] $2.40 Represents the exercise price of 2.40 dollars per share. Entity Central Index Key Exercise Price Dollars 7.92 [Member] $7.92 Represents the exercise price of 7.92 dollars per share. Represent the percentage of co-promotion fee required to be repaid if the entity terminates the agreement without cause during period one. Collaborative Arrangement, Percentage of Co Promotion Fee Repaid Termination of Agreement Period One Percentage of co-promotion fee required to be repaid if agreement terminated prior to January 2014 Collaborative Arrangement, Percentage of Co Promotion Fee Repaid Termination of Agreement Period Two Percentage of co-promotion fee required to be repaid if agreement terminated between January 2014 and January 2015 Represent the percentage of co-promotion fee required to be repaid if the entity terminates the agreement without cause during period two. Collaborative Arrangement, Percentage of Co Promotion Fee Repaid Termination of Agreement Period Three Percentage of co-promotion fee required to be repaid if agreement terminated between January 2015 and January 2016 Represent the percentage of co-promotion fee required to be repaid if the entity terminates the agreement without cause during period three. Entity Common Stock, Shares Outstanding Organization and Summary of Significant Accounting Policies [Table] Disclosure for all significant accounting policies of the reporting entity. Organization and Summary of Significant Accounting Policies [Line Items] Overview Co-promotion expenses Represents the amount of co-promotion expenses incurred under the agreement. Collaborative Arrangement Co Promotion Expenses Collaborative Arrangement Outstanding Obligation Outstanding obligation to Genzyme Represents the amount of outstanding obligation under the agreement. Represents the number of shares of preferred stock warrants converted. Class of Warrant or Right Number of Shares of Preferred Stock Warrants Converted Preferred stock warrants converted (in shares) Class of Warrant or Right Shares of Common Stock Warrants Issued Upon Conversion of Shares of Preferred Stock Warrants Warrants issued to purchase common stock upon conversion of preferred stock warrants (in shares) Represents the number of shares of common stock warrants issued upon conversion of shares of preferred stock warrants. $0.08-$12.12 Represents the range of exercise prices from 0.08 dollars to 12.12 dollars per share. Exercise Price Range from Dollars 0.08 to Dollars 12.12 [Member] Value of convertible preferred stock issued during the period. Stock Issued During Period Value Convertible Preferred Stock Issuance of convertible preferred stock, net of issuance costs and preferred stock liability Stock Issued During Period Shares Convertible Preferred Stock Issuance of convertible preferred stock, net of issuance costs and preferred stock liability (in shares) Number of convertible preferred shares issued during the period. Adjustments to Additional Paid in Capital on Reclassification of Preferred Stock Warrant Reclassification of preferred stock warrant liability into additional paid-in capital upon initial public offering Amount of increase in additional paid-in capital (APIC) upon reclassification of preferred stock warrant liability during the period. Adjustments to Additional Paid in Capital Share Based Compensation Employee Stock-based compensation expense (employee) Amount of increase in additional paid-in capital (APIC) resulting from employee stock-based compensation expense. Stock-based compensation expense (non employee) Adjustments to Additional Paid in Capital Share Based Compensation Non Employee Amount of increase in additional paid-in capital (APIC) resulting from non-employee stock-based compensation expense. Adjustments to Additional Paid in Capital Equity Based Compensation Equity-based compensation Represents the amount of increase in additional-paid in capital (APIC) resulting from equity-based compensation. Common stock subject to repurchase Represents the amount of decrease in additional paid-in capital (APIC) due to common stock subject to repurchase. Adjustments to Additional Paid in Capital Common Stock Subject to Repurchase Convertible Preferred Stock Issued Issuance Costs Issuance of convertible preferred stock, issuance cost Direct costs (e.g., legal and accounting fees) associated with issuing convertible preferred stock. Also includes any direct costs associated with stock issues under a shelf registration. The value of the preferred stock warrant liability converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. Conversion of Preferred Stock Warrant Liability Amount Converted Conversion of preferred stock warrant liability to common stock warrants Common Stock Issued Issuance Costs Issuance of common stock in initial public offering, issuance cost Document Fiscal Year Focus Future cash outflow to pay for convertible preferred stock issuance costs. Preferred Stock Issuance Costs Incurred but Not Yet Paid Convertible preferred stock issuance costs included in accounts payable Document Fiscal Period Focus Represents the amount of equity based compensation transferred from liabilities to equity. Stock Based Compensation Transfer to Equity Transfer of equity-based compensation from liabilities to equity Net Proceeds from Issuance of Redeemable Convertible Preferred Stock Proceeds Net of Issuance Costs and Preferred Stock Liability Represents the cash inflow from proceeds net of issuance costs and preferred stock liability. Represents the number of closings. Number of Closings Number of closings Temporary Equity Number of Shares that May be Sold in Initial Purchase Number of shares that may be sold in initial purchase Represents the number of shares that may be sold in initial purchase under the agreement. Temporary Equity Number of Shares that May be Sold in Second Closing Number of shares that may be sold in second closing Represents the number of shares that may be sold in second closing under the agreement. Increase (Decrease) in Convertible Preferred Stock and Stockholders Equity [Roll Forward] Increase (Decrease) in Convertible Preferred Stock and Stockholders' Equity (Deficit) A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. Issuance of convertible preferred stock, issue price (in dollars per share) Convertible Preferred Stock Original Issue Price Original Issue Price (in dollars per share) Original issue price of a single share of convertible preferred stock of a company. Preferred stock liability Fair Value of Preferred Stock Liability The fair value of preferred stock liability assumed in noncash investing or financing activities. Issuance of convertible preferred stock, preferred stock liability Derivative Financial Instruments Liabilities Preferred Stock Liability [Member] Preferred stock liability This item represents preferred stock liability derivative instrument obligations meeting the definition of a liability which are reported as of the balance sheet date. Derivative instrument obligations are generally measured at fair value, and adjustments to the carrying amount of hedged items reflect changes in their fair value (that is, losses) that are attributable to the risk being hedged and that arise while the hedge is in effect. Derivative Financial Instruments Liabilities Preferred Stock Warrant Liability [Member] Preferred stock warrant liability This item represents preferred stock warrant liability derivative instrument obligations meeting the definition of a liability which are reported as of the balance sheet date. Derivative instrument obligations are generally measured at fair value, and adjustments to the carrying amount of hedged items reflect changes in their fair value (that is, losses) that are attributable to the risk being hedged and that arise while the hedge is in effect. Collaborative Arrangement Payment Received Amount received from Genzyme in connection with an extension of an exclusive right to negotiate co-promotion agreement Cash inflow from the extension of an exclusive right to negotiate agreement. Legal Entity [Axis] The number of shares authorized to be issued and sold under the agreement entered into by the entity. Temporary Equity Stock Authorized to be Issued and Sold Shares authorized to be issued and sold Document Type Aggregate number of common shares to be issued in the conversion of convertible preferred stock. Conversion of Stock Shares Issued as If Converted Conversion of convertible preferred stock (in shares) Organization and Summary of Significant Accounting Policies Conversion of Stock Shares Issued as If Converted Convertible Preferred Stock Reserved for Issuance Conversion of convertible preferred stock reserved for issuance (in shares) Aggregate number of common shares reserved for future issuance for shares to be issued in the conversion of convertible preferred stock reserved for issuance. Employee Newly Hired [Member] Newly hired employee A newly hired employee. Share Based Compensation Arrangement by Share Based Payment Award Percentage of Voting Power of All Classes of Stock Voting power of person owning stock (as a percent) Voting power of all classes of stock, as a percent, of person owning stock as threshold for option terms under the entity's stock option plan. Share based Compensation Arrangement by Share based Payment Award Award Vesting Rights Percentage Year One Percentage of award vesting after one year Percentage of vesting of share-based compensation awards after one year from date of grant. Transfer of preferred stock liability to equity Represents the amount of preferred stock liability transferred to equity. Transfer of Preferred Stock Liability to Equity Fair Value of Preferred Stock Warrants Preferred stock warrants Represents the fair value of preferred stock warrants in noncash investing or financing activities. Represents information pertaining to incentive stock options (ISOs). Incentive Stock Options [Member] ISO Represents information pertaining to non statutory stock options (NSOs). Non Statutory Stock Options [Member] NSO Outside Director who was not Previously Employee [Member] Outside director who was not previously an employee Represents information pertaining to outside director, who was not previously an employee. Common Stock Discount on Shares and Commissions Issuance of common stock in initial public offering, discounts and commissions Amount of discount on common shares, or any unamortized balance thereof, shown separately as a deduction from the applicable account(s) as circumstances require and commissions on issuance of stock in initial public offering. Fair Value Net Derivative Asset Liability Measured on Recurring Basis Unobservable Inputs Reconciliation Conversion Conversion of preferred stock warrant liability Amount of conversion of financial instrument classified as a derivative asset (liability) after deduction of derivative liability, measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Accounts payable Accounts Payable [Member] Class of Warrant or Right Term of Warrants or Rights Warrant term Period over which each class of warrants or rights outstanding may be exercised. Outside Director [Member] Outside director Nonemployee serving on the board of directors (who collectively have responsibility for governing the entity). Share Based Compensation Arrangement by Share Based Payment Award Options Initial Grants Shares granted as initial grant Gross number of share options (or share units) granted to each individual as an initial grant. Gross number of share options (or share units) granted to each individual as an annual grant. Share Based Compensation Arrangement by Share Based Payment Award Options Annual Grants Shares granted as annual grant Extinguishment of Preferred Stock Liability Extinguishment of the preferred stock liability Represents the amount of extinguishment of the preferred stock liability. Accrued Liabilities Accounts Payable and Accrued Liabilities Disclosure [Text Block] Proceeds from Issuance Initial Public Offering Net Net proceeds from issuance of common stock in IPO The net cash amount received from entity's first offering of stock to the public. Offering Expenses Offering expenses Amount of offering expenses payable by the entity. Organization Consolidation and Presentation of Financial Statements [Table] Disclosure of information about organization, consolidation and presentation of financial statements. Organization Consolidation and Presentation of Financial Statements [Line Items] Organization Consolidation And Presentation Of Financial Statements Line Items Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Number of additional shares reserved for issuance Aggregate number of additional common shares reserved for future issuance under the plan. Common Stock Capital Additional Shares Reserved for Future Issuance Components Of Deferred Tax Assets Current [Abstract] Current deferred tax assets: Initial Public Offering Costs Included in Accounts Payable and Accrued Liabilities IPO costs included in accounts payable and accrued liabilities Represents the amount of IPO costs included in accounts payable and accrued liabilities. Number of shares of stock issued during the period as a result of the exercise of warrants. Stock Issued During Period Shares Warrants Exercised Issuance of common stock on exercise of warrant (in shares) Exercise Price Range from Dollars 14.34 to Dollars 18.24 [Member] $14.34-18.24 Represents the range of exercise prices from 14.34 dollars to 18.24 dollars per share. Exercise Price Range from Dollars 0.08 to Dollars 7.92 [Member] $0.08-7.92 Represents the range of exercise prices from 0.08 dollars to 7.92 dollars per share. Exercise Price Range from Dollars 0.08 to Dollars 18.24 [Member] $0.08-18.24 Represents the range of exercise prices from 0.08 dollars to 18.24 dollars per share. The cash outflow for cost incurred directly with the issuance of convertible preferred stock. Payment of convertible preferred stock issuance costs Payments of Stock Issuance Costs Convertible Preferred Stock Payments of Stock Issuance Costs Initial Public Offering The cash outflow for cost incurred directly with the issuance of an equity security in initial public offering. Commissions and issuance costs relating to the initial public offering Accounts Receivable, Net, Current Accounts receivable, net of allowance of $135 and $107 as of March 31, 2014 and December 31, 2013 Accounts payable Accounts Payable, Current Outstanding obligations Accounts receivable Accounts Receivable [Member] Accrued Liabilities Accrued Liabilities, Current [Abstract] Accrued liabilities Accrued Liabilities [Member] Accrued Genzyme co-promotion fees Accrued Marketing Costs, Current Accrued liabilities Accrued Liabilities, Current Accrued liabilities Accrued liabilities associated with employee and executive bonus plans Accrued Bonuses, Current Accrued legal and professional fees Accrued Professional Fees, Current Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated depreciation Additional paid-in capital Additional Paid in Capital, Common Stock Additional Paid-in Capital Additional Paid-in Capital [Member] Adjustments to reconcile net loss to net cash used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Share-based compensation expense (in dollars) Allocated Share-based Compensation Expense Accounts receivable, allowance (in dollars) Allowance for Doubtful Accounts Receivable, Current Allowance for doubtful accounts Beginning balance Ending balance Activity of allowance for doubtful accounts Allowance for Doubtful Accounts Receivable [Roll Forward] Schedule of balance of allowance for doubtful accounts, including charges to bad debt expense and write-offs, net of recoveries Allowance for Credit Losses on Financing Receivables [Table Text Block] Write-offs, net of recoveries Allowance for Doubtful Accounts Receivable, Write-offs Amortization of debt discount and issuance costs Amortization of Financing Costs and Discounts Antidilutive Securities [Axis] Outstanding shares of common stock equivalents that have been excluded from diluted net loss per common share Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities, Name [Domain] Total shares of common stock equivalents (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Long-lived Assets Asset Impairment Charges [Abstract] Total assets Assets Assets, Current [Abstract] Current assets: Assets [Abstract] Assets Assets, Current Total current assets Financial Assets Assets, Fair Value Disclosure Balance Sheet Location [Axis] Balance Sheet Components Balance Sheet Location [Domain] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Organization and Description of Business Business Description and Basis of Presentation [Text Block] Purchases of property and equipment included in accounts payable and accrued liabilities Capital Expenditures Incurred but Not yet Paid Amortization expense Capitalized Computer Software, Amortization Capitalized costs Capitalized Computer Software, Additions Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash and cash equivalents Cash and Cash Equivalents Cash and Cash Equivalents, Unrestricted Cash and Cash Equivalents, Policy [Policy Text Block] Chief Executive Officer Chief Executive Officer [Member] Common Stock Class of Stock [Line Items] Class of Warrant or Right [Axis] Class of Warrant or Right [Domain] Common stock warrants issued and outstanding (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Exercise price of warrant to purchase shares of Series C convertible preferred stock (in dollars per share) Exercise price of common stock (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Number of shares of preferred stock that can be purchased by each warrant Class of Warrant or Right, Number of Securities Called by Each Warrant or Right Convertible preferred stock warrant Class of Warrant or Right [Line Items] Class of Stock [Domain] Class of Warrant or Right [Table] Variable Interest Entity, Classification [Domain] Genzyme Co-promotion Agreement Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] Collaborative Arrangement, Co-promotion [Member] Co-promotion agreement Genzyme Co-promotion Agreement Collaborative Arrangement Disclosure [Text Block] Commitments and Contingencies Commitments and contingencies (Note 5) Commitments and Contingencies. Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Par value of shares of common stock (in dollars per share) Common Stock Common Stock [Member] Common stock Common stock, $0.001 par value; 125,000,000 shares authorized, 21,164,410 and 21,143,313 shares issued and outstanding as of March 31, 2014 and December 31, 2013, respectively Common Stock, Value, Issued Common stock, shares issued Common Stock, Shares, Issued Issuance of common stock (in shares) Common stock, shares authorized Common Stock, Shares Authorized Authorized shares of common stock Shares of common stock reserved for issuance Common Stock, Capital Shares Reserved for Future Issuance Number of shares reserved for issuance Common stock, shares outstanding Common Stock, Shares, Outstanding 401(k) Plan Compensation Related Costs, Policy [Policy Text Block] Bonus Accruals Tax effects of temporary 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Tax Rate Reconciliation, Nondeductible Expense, Amount U.S. federal taxes at statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Income Taxes Income Tax, Policy [Policy Text Block] State taxes (net of federal benefit) Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Accounts receivable Increase (Decrease) in Accounts Receivable Accounts payable Increase (Decrease) in Accounts Payable Other assets Increase (Decrease) in Other Noncurrent Assets Co-promotion fee received from Genzyme Deferred Genzyme co-promotion fee Increase (Decrease) in Deferred Revenue Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Supplies inventory Increase (Decrease) in Inventories Prepaid expenses and current other assets Increase (Decrease) in Prepaid Expense and Other Assets Change in restricted cash Increase (Decrease) in Restricted Cash Nominal interest on the debt excluding 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Revenue Forecast Scenario, Forecast [Member] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of the fair value of the Company's financial assets and liabilities measured on a recurring basis Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of outstanding shares of common stock equivalents that have been excluded from diluted net loss per common share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Summary of activity under the Company's stock option plans Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of assumptions used to calculate estimated grant date fair value of employee stock options using the Black-Scholes option-pricing valuation model Schedule of Effective Income Tax Rate 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Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Canceled (in shares) Canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Options exercisable at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Additional disclosures Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Balance at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Balance at the beginning of the period (in shares) Options available for grant under stock option plans (in shares) Number of shares available for issuance Intrinsic value of stock options exercised (in dollars) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected volatility (as a percent) Risk-free interest rate (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Assumptions used to calculate estimated fair value of stock options using the Black-Scholes option-pricing valuation model Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Weighted average fair value of stock options granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Balance at beginning of the period (in dollars per share) Balance at the end of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Stock-based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Balance at beginning of the period (in shares) Balance at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options issued and outstanding (in shares) Outstanding and exercisable stock options Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Options vested and expected to vest at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Balance at the beginning of the period (in dollars) Balance at the end of the period (in dollars) Options Outstanding, Aggregate Intrinsic Value (in dollars) Exercise Price Range [Axis] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Stock Options Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Equity Award [Domain] Exercise price, low end of range (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit Options vested and expected to vest at the end of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Options vested and expected to vest at the end of the period (in dollars) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Options Outstanding, Number (in shares) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options Options Vested and Exercisable, Number (in shares) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options Exercise price, high end of range (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit Balance (in shares) Balance (in shares) Shares, Outstanding Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Capitalized software Software Development [Member] Software, including software developed for internal use Software and Software Development Costs [Member] State and Local Jurisdiction [Member] State Statement [Table] Statement Statement [Line Items] Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) CONDENSED STATEMENTS OF CASH FLOWS Equity Components [Axis] CONDENSED BALANCE SHEETS Class of Stock [Axis] Stock Issued During Period, Shares, Period Increase (Decrease) Stock Issued During Period, Value, Stock Options Exercised Issuance of common stock on exercise of stock options Stock Issued During Period, Value, Conversion of Convertible Securities Conversion of preferred stock into common stock upon initial public offering Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Issuance of common stock on exercise of stock options (in shares) Number of shares issued and sold in IPO Stock Issued During Period, Shares, New Issues Issuance of common stock in initial public offering, net of discounts and commissions of $4,642 and issuance costs of $2,507 (in shares) Common stock issued on automatic conversion of outstanding convertible preferred stock (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Conversion of preferred stock into common stock upon initial public offering (in shares) Stock Issued During Period, Value, New Issues Issuance of common stock in initial public offering, net of discounts and commissions of $4,642 and issuance costs of $2,507 Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Stockholders' Equity, Period Increase (Decrease) Balance Total stockholders' equity Stockholders' Equity Attributable to Parent Balance Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Reverse stock split ratio Stockholders' Equity Note, Stock Split, Conversion Ratio Subsequent Events Subsequent Events [Text Block] Subsequent Events Subsequent Event [Table] Subsequent Events Subsequent Event [Line Items] Subsequent Events Subsequent Event [Member] Subsequent events Subsequent Event Type [Domain] Subsequent Event Type [Axis] Balance Sheet Components Supplemental Balance Sheet Disclosures [Text Block] Supplementary cash flow information of non cash investing and financing activities: Supplemental Cash Flow Information [Abstract] Credit carryforwards available to reduce future taxable income Tax Credit Carryforward, Amount Credit carryforwards Tax Credit Carryforward [Line Items] Tax Credit Carryforward [Table] Convertible preferred stock, shares outstanding Temporary Equity, Shares Outstanding Shares Outstanding Balance (in shares) Balance (in shares) Convertible preferred stock, par value (in dollars per share) Temporary Equity, Par or Stated Value Per Share Convertible preferred stock, $0.001 par value; 0 and 59,147,999 shares authorized, 0 and 53,084,507 shares issued and outstanding as of December 31, 2013 and December 31, 2012; aggregate liquidation value of $0 and $65,835 as of December 31, 2013 and 2012 Temporary Equity, Carrying Amount, Attributable to Parent Balance Balance Schedule of convertible preferred stock Temporary Equity [Table Text Block] Convertible preferred stock Temporary Equity [Line Items] Convertible preferred stock, shares authorized Temporary Equity, Shares Authorized Number of authorized shares Shares Authorized Convertible Preferred Stock Convertible preferred stock, shares issued Temporary Equity, Shares Issued Shares Issued Aggregate liquidation value Temporary Equity, Liquidation Preference Aggregate Liquidation Amount Temporary Equity, by Class of Stock [Table] Temporary Equity, Carrying Amount, Period Increase (Decrease) Title of Individual [Axis] Relationship to Entity [Domain] Type of Arrangement and Non-arrangement Transactions [Axis] Interest expense or penalties related to unrecognized tax benefits Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Gross increases-current period tax positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Gross decrease-tax position in prior period Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Unrecognized tax benefits, which if recognized, would affect the effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Unrecognized tax benefit Lapse of statute of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Unrecognized tax benefit Unrecognized Tax Benefits Unrecognized tax benefits, beginning of period Unrecognized tax benefits, end of period Gross increases-tax position in prior period Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Use of Estimates, Policy [Policy Text Block] Use of Estimates Increase in valuation allowance against deferred tax assets Valuation Allowance, Deferred Tax Asset, Change in Amount Variable Interest Entities [Axis] Thyroid Cytology Partners Variable Interest Entity, Not Primary Beneficiary [Member] Thyroid Cytology Partners Variable Interest Entity [Line Items] Warrant [Member] Shares of common stock warrants Convertible Preferred Stock Warrant Pro forma adjustments to reflect assumed conversion of convertible preferred stock (in shares) Weighted Average Number Basic Shares Outstanding Adjustment, Pro Forma Weighted Average Number of Shares Outstanding, Basic and Diluted Shares used to compute net loss per common share, basic and diluted (in shares) Shares used to compute net loss per common share, basic and diluted