Prosigna customer relationships Customer Relationships [Member] Number of disease areas with genomic testing Number of Disease Areas With Genomic Testing Number of Disease Areas With Genomic Testing Revaluation of acquisition-related contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability City Area Code City Area Code Thyroid Cytopathology Partners Long-term Contracts or Programs Disclosure [Text Block] Interest on end-of-term debt obligation Interest Expense and Prepayment Penalty Interest Expense and Prepayment Penalty Contract with customer, revenue recognized Contract with Customer, Liability, Revenue Recognized Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Total current liabilities Liabilities, Current Title of 12(b) Security Title of 12(b) Security Prior period reclassification adjustment Prior Period Reclassification Adjustment Issuance of common stock under ESPP (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Financial assets Assets, Fair Value Disclosure Total number of shares reserved for issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Debt prepayment tranche one Debt Prepayment Tranche One [Member] Debt Prepayment Tranche One [Member] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Counterparty Name [Axis] Counterparty Name [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Concentration Risk [Table] Concentration Risk [Table] Asset Class [Axis] Asset Class [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Other assets Increase (Decrease) in Other Noncurrent Assets AstraZeneca AstraZeneca [Member] AstraZeneca Concentrations of Credit Risk and Other Risks and Uncertainties Concentration Risk [Line Items] Schedule of future minimum lease payments under non-cancelable operating leases Lessee, Operating Lease, Liability, Maturity [Table Text Block] Revenue recognition Revenue Recognition [Member] Revenue Recognition Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Long-term debt Long-term Debt, Gross Current Fiscal Year End Date Current Fiscal Year End Date Other Services Service [Member] Assets Assets [Abstract] End-of-term debt obligation Debt Instrument End Of Term, Interest Obligation Amount Debt Instrument End Of Term, Interest Obligation Amount Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Balance (in shares) Balance (in shares) Shares, Outstanding Preferred stock, par value (in usd per share) Preferred Stock, Par or Stated Value Per Share Number of operating segments Number of Operating Segments Gain on disposal of property and equipment Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Entity Address, Postal Zip Code Entity Address, Postal Zip Code Options issued and outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Payables and Accruals [Abstract] Payables and Accruals [Abstract] Property and equipment, net Property, Plant and Equipment, Net London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Total assets Assets Tax portion of vested restricted stock units Share-based Payment Arrangement, Decrease for Tax Withholding Obligation Entity Shell Company Entity Shell Company Operating lease, liability Present value of future lease payments Operating Lease, Liability Cover [Abstract] Document Type Document Type Effective interest rate (as a percent) Debt Instrument, Interest Rate, Effective Percentage Notice of intent not to renew period Agreement Terms, Non-Renewal Notice Period Represents the minimum period required to provide notice of intent not to renew agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Less: amount representing interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Net loss per common share, basic and diluted (in usd per share) Net income (loss) per common share, basic and diluted (in usd per share) Earnings Per Share, Basic and Diluted Variable Rate [Domain] Variable Rate [Domain] Payment of long-term debt Repayments of long-term debt Repayments of Long-term Debt Finite-lived intangible assets, net Finite-Lived Intangible Assets, Net Contract agreement term Term, Contract Agreement Term, Contract Agreement Equity Interest Type [Axis] Equity Interest Type [Axis] Schedule of Operating Leased Assets [Table] Schedule of Operating Leased Assets [Table] Acquisition-related contingent consideration Acquisition related contingent liability Business Combination, Contingent Consideration, Liability Customer [Domain] Customer [Domain] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable 2022 Lessee, Operating Lease, Liability, Payments, Due Year Four Current liabilities: Liabilities, Current [Abstract] Increase (Decrease) in Stockholders' Equity [Rollforward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Credit Facility [Axis] Credit Facility [Axis] Range [Axis] Statistical Measurement [Axis] Supplementary cash flow information: Supplemental Cash Flow Information [Abstract] Net assets acquired Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Thyroid Cytopathology Partners Variable Interest Entity [Line Items] Silicon Valley Bank Silicon Valley Bank [Member] Silicon Valley Bank [Member] Concentrations of Credit Risk and Other Risks and Uncertainties Concentrations of Credit and Other Risks and Uncertainties [Policy Text Block] Disclosure of accounting policy for concentrations of credit risk and other risks and uncertainties. Equity [Abstract] Equity [Abstract] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Schedule of reserved shares of common stock for issuance Schedule of Common Stock Capital Shares Reserved for Future Issuance [Table Text Block] Tabular disclosure of number of common shares reserved for future issuance. Preferred stock, outstanding (in shares) Preferred Stock, Shares Outstanding Accounts payable Increase (Decrease) in Accounts Payable Biopharmaceutical Biopharmaceutical [Member] Biopharmaceutical Document Quarterly Report Document Quarterly Report Commitments and contingencies Commitments and Contingencies Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Cash, cash equivalents and restricted cash at beginning of period Cash, cash equivalents and restricted cash at end of period Total cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Debt Instrument [Line Items] Debt Instrument [Line Items] Shares used to compute net loss per common share, basic and diluted (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Debt prepayment tranche two Debt Prepayment Tranche Two [Member] Debt Prepayment Tranche Two [Member] Debt Debt Disclosure [Text Block] Number of tissue sample deliveries (in deliveries) Number of Tissue Sample Deliveries Number of Tissue Sample Deliveries Money market funds Money Market Funds [Member] Organization and Description of Business Business Description and Basis of Presentation [Text Block] Lender Name [Axis] Lender Name [Axis] Asset Class [Domain] Asset Class [Domain] Common stock, authorized (in shares) Common Stock, Shares Authorized Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Accounts Receivable, after Allowance for Credit Loss Accounts Receivable, after Allowance for Credit Loss Price per share (in usd per share) Sale of Stock, Price Per Share Entity Central Index Key Entity Central Index Key Entity File Number Entity File Number Future minimum lease payments under non-cancelable operating leases Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] LymphMark product technology LymphMark Product Technology [Member] LymphMark Product Technology Entity Emerging Growth Company Entity Emerging Growth Company Sale of Stock [Domain] Sale of Stock [Domain] Stock-based compensation Share-based Payment Arrangement, Noncash Expense Operating Lease, Liability, Current Less: short-term lease liabilities Operating Lease, Liability, Current NanoString NanoString [Member] NanoString Schedule of the Company's third-party payers as a percentage of total Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Long-term debt Long-term Debt, Excluding Current Maturities 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. Document Fiscal Period Focus Document Fiscal Period Focus Schedule of identifiable acquisition-related intangibles Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Stock issuance costs Payments of Stock Issuance Costs Credit Facility [Domain] Credit Facility [Domain] Stock-based compensation expense (employee) Adjustments to Additional Paid in Capital Share Based Compensation Employee Amount of increase in additional paid-in capital (APIC) resulting from employee stock-based compensation expense. Accrued compensation expenses Employee-related Liabilities, Current Remainder of 2020 Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year Level II Fair Value, Inputs, Level 2 [Member] Product and Service [Domain] Product and Service [Domain] Income Taxes Income Tax Disclosure [Text Block] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Secured debt Secured Debt [Member] Thyroid Cytopathology Partners Thyroid Cytopathology Partners Concentration Risk Type [Axis] Concentration Risk Type [Axis] Loss from operations Loss from operations Operating Income (Loss) Goodwill Goodwill Preferred stock, issued (in shares) Preferred Stock, Shares Issued Product Tissue Samples Product [Member] Statement Statement [Line Items] Shares of common stock subject to outstanding options Employee And Non Employee Stock Option [Member] 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. Total Revenue Revenue Revenue from Contract with Customer, Excluding Assessed Tax Liabilities and Stockholders’ Equity Liabilities and Equity [Abstract] Other assets Other Assets, Noncurrent Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Gross receivables concentration risk Credit Concentration Risk [Member] Comprehensive loss Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Net debt obligation Long-term Debt Operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Over-Allotment Option Over-Allotment Option [Member] Schedule of accrued liabilities Schedule of Accrued Liabilities [Table Text Block] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Amendment Flag Amendment Flag Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Change in Accounting Estimate, Type [Domain] Change in Accounting Estimate, Type [Domain] nCounter FLEX Dx license nCounter FLEX Dx License [Member] nCounter FLEX Dx License Reduction to rent expense for TCP's portion of costs for subleased space Other Income Rent Reimbursement Amount of reimbursement from third party for rent and related operating expenses for shared space included in other income in the income statement. Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Common stock, outstanding (in shares) Common Stock, Shares, Outstanding 2023 Lessee, Operating Lease, Liability, Payments, Due Year Five Balloon payment to be paid Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid Level I Fair Value, Inputs, Level 1 [Member] Customer [Axis] Customer [Axis] Interest expense Interest Expense Biopharmaceutical Company Biopharmaceutical Company [Member] Biopharmaceutical Company [Member] Thyroid Cytopathology Partners Variable Interest Entity, Not Primary Beneficiary [Member] Percent of principal amount needed to be collateralized by U.S. treasury and agency securities Percent of Principal Amount Needed To Be Collateralized By U.S. Treasury and Agency Securities Percent of Principal Amount Needed To Be Collateralized By U.S. Treasury and Agency Securities Equity issued in business acquisition Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Sale of Stock [Axis] Sale of Stock [Axis] Use of Estimates Use of Estimates, Policy [Policy Text Block] Accounting Policies [Abstract] Accounting Policies [Abstract] Liquidity requirement, minimum Liquidity Requirement, Minimum Liquidity Requirement, Minimum Write-down of supplies Inventory Write-down Additional Paid-in Capital Additional Paid-in Capital [Member] Local Phone Number Local Phone Number Debt Payment Tranche [Domain] Debt Payment Tranche [Domain] [Domain] for Debt Payment Tranche [Axis] Debt prepayment tranche three Debt Prepayment Tranche Three [Member] Debt Prepayment Tranche Three [Member] Total future minimum lease payments Lessee, Operating Lease, Liability, Payments, Due Headquarters and laboratory facilities, South San Francisco, lease signed April 2015 Headquarters And Laboratory Facilities South San Francisco Lease Two [Member] Represents the lease for headquarters and laboratory space in South San Francisco, California that expires March 2026. Accounts receivable Accounts Receivable [Member] Accounts receivable Accounts Receivable, after Allowance for Credit Loss, Current Operating lease expense Operating Lease, Expense Receivable from agreement Contract Agreement, Receivable For Services Contract Agreement, Receivable For Services Interest rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Cash and Cash Equivalents [Line Items] Cash and Cash Equivalents [Line Items] Entity Address, Address Line One Entity Address, Address Line One Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Entity Address, Address Line Two Entity Address, Address Line Two Business Combinations [Abstract] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Number of major financial institutions with which the company's cash and cash equivalents are deposited (in financial institutions) Number of Major Financial Institutions with which Cash and Cash Equivalents Deposited Represents the number of major financial institutions, with which cash and cash equivalents are deposited by the entity. Geographical [Domain] Geographical [Domain] Cash paid in business acquisition Payments to Acquire Businesses, Gross Purchases of property and equipment included in accounts payable and accrued liability Capital Expenditures Incurred But Not Yet Paid Net Future cash outflow (inflow) to pay for purchases of fixed assets that have occurred. Entity Address, State or Province Entity Address, State or Province Business Acquisition [Axis] Business Acquisition [Axis] Total current assets Assets, Current Entity Current Reporting Status Entity Current Reporting Status Revenue concentration risk Customer Concentration Risk [Member] Total identifiable intangible assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Net decrease in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Contractual proceeds Contract Agreement, Conditional Additional Receivable Contract Agreement, Conditional Additional Receivable Proceeds from the exercise of common stock options and employee stock purchases Proceeds from Stock Options Exercised Operating lease liability Increase (Decrease) Operating Lease, Right Of Use Asset (Lease Liability) Increase (Decrease) Operating Lease, Right Of Use Asset (Lease Liability) Common Stock Common Stock [Member] Current assets: Assets, Current [Abstract] Proceeds from disposal of property and equipment Proceeds from Sale of Property, Plant, and Equipment Business Acquisition [Line Items] Business Acquisition [Line Items] Automatic renewal period of contract agreement Automatic Renewal Period, Contract Agreement Automatic Renewal Period, Contract Agreement General and administrative General and Administrative Expense Accounts payable Accounts Payable, Current Amortization of debt issuance costs Amortization of Debt Issuance Costs and Discounts Common Stock Common Stock [Abstract] No definition available. Product and Service [Axis] Product and Service [Axis] Accrued liabilities Total accrued liabilities Accrued Liabilities, Current Entity Small Business Entity Small Business Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Entity Interactive Data Current Entity Interactive Data Current Stock-based compensation expense (ESPP) Adjustments To Additional Paid In Capital Share Based Compensation ESPP Amount of increase in additional paid-in capital (APIC) resulting from ESPP stock-based compensation expense. Common stock, issued (in shares) Common Stock, Shares, Issued Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Total operating expenses Costs and Expenses Common stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share Entity Filer Category Entity Filer Category Contingent consideration, maximum to be paid Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High 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] Other assets Other Noncurrent Assets [Member] Accrued other Other Accrued Liabilities, Current Termination period Termination Period, Contract Agreement Termination Period, Contract Agreement Payment of taxes on vested restricted stock units Payment, Tax Withholding, Share-based Payment Arrangement Supplies Inventory, Net Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total liabilities and stockholders’ equity Liabilities and Equity Entity Address, City or Town Entity Address, City or Town Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Concentration risk percentage Concentrations of credit risk (as a percent) Concentration Risk, Percentage Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Percepta v.2 Percepta v.2 [Member] Percepta v.2 Net Loss Per Common Share Earnings Per Share [Text Block] Percentage of net cash collections, fee Contract Agreement, Fee, Percentage Of Cash Collections Contract Agreement, Fee, Percentage Of Cash Collections Shares available for issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Operating Lease, Liability, Noncurrent Long-term lease liabilities Operating Lease, Liability, Noncurrent Variable Interest Entities [Axis] Variable Interest Entities [Axis] Equity Award [Domain] Award Type [Domain] Operating expenses: Operating Expenses [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized Revolving credit facility Revolving Credit Facility [Member] Issuance of common stock under employee stock purchase plan (ESPP) Stock Issued During Period, Value, Employee Stock Purchase Plan Sale of common stock in a public offering, net of issuance costs (in shares) Number of shares issued and sold (in shares) Stock Issued During Period, Shares, New Issues Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Document Fiscal Year Focus Document Fiscal Year Focus Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Revenue Revenue Benchmark [Member] Restricted stock units Restricted Stock Units (RSUs) [Member] Johnson & Johnson Johnson & Johnson Services, Inc. [Member] Johnson & Johnson Services, Inc. [Member] Operating Leases Operating Leased Assets [Line Items] Schedule of debt obligation for borrowings Schedule of Debt [Table Text Block] Issuance of common stock on exercise of stock options and vesting of restricted stock units (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options and Non-Option Equity Instruments, Exercises in Period Share-based Compensation Arrangement by Share-based Payment Award, Options and Non-Option Equity Instruments, Exercises in Period Fair value measurements Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Total liabilities Liabilities Business Combination Business Combination Disclosure [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 Text Block] Award Type [Axis] Award Type [Axis] Cost of testing revenue Cost of Revenue Common stock, $0.001 par value; 125,000,000 shares authorized, 49,999,923 and 49,625,341 shares issued and outstanding as of March 31, 2020 and December 31, 2019, respectively Common Stock, Value, Issued Accrued Liabilities Accounts Payable and Accrued Liabilities Disclosure [Text Block] Research and development Research and Development Expense Other income, net Other Nonoperating Income (Expense) Class of Stock [Line Items] Class of Stock [Line Items] Medicare Medicare [Member] Represents information pertaining to Medicare, a significant third-party payer. Counterparty Name [Domain] Counterparty Name [Domain] Testing Testing [Member] Testing Schedule of Cash and Cash Equivalents [Table] Schedule of Cash and Cash Equivalents [Table] Supplies Increase (Decrease) in Inventories Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Geographical [Axis] Geographical [Axis] Accumulated Deficit Retained Earnings [Member] Noncash lease expense Noncash Lease Expenses Noncash Lease Expenses Overnight repurchase agreements Overnight Repurchase Agreements [Member] Overnight Repurchase Agreements [Member] Right-of-use assets - operating lease Operating Lease, Right-of-Use Asset Equity Components [Axis] Equity Components [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Change in Accounting Estimate by Type [Axis] Change in Accounting Estimate by Type [Axis] Document Period End Date Document Period End Date Statement [Table] Statement [Table] Entity Registrant Name Entity Registrant Name Equity Interest Issued or Issuable, Type [Domain] Equity Interest Issued or Issuable, Type [Domain] Total stockholders’ equity Balance Balance Stockholders' Equity Attributable to Parent Intangible asset amortization Amortization of Intangible Assets Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Deferred revenue Contract with Customer, Liability Amount of space leased (in square feet) Lessee Leasing Arrangements, Operating Leases, Space Leased Amount of space leased under the terms of the agreement. Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Fair Value Measurements Fair Value Disclosures [Text Block] Contract agreement, amount Contract Agreement, Amount Contract Agreement, Amount Prepayment premium Debt Instrument, Prepayment Premium Amount of prepayment premium waived. 2021 Lessee, Operating Lease, Liability, Payments, Due Year Three Issuance of common stock on exercise of stock options and vesting of restricted stock units Share-based Compensation Arrangement by Share-based Payment Award, Value, Options and Non-Option Equity Instruments, Exercises in Period Share-based Compensation Arrangement by Share-based Payment Award, Value, Options and Non-Option Equity Instruments, Exercises in Period Net loss and comprehensive loss Net loss Net Income (Loss) Available to Common Stockholders, Basic Depreciation and amortization Depreciation, Depletion and Amortization Restricted cash Restricted Cash and Cash Equivalents, Noncurrent Laboratory facilities, Austin, Texas Laboratory Facilities Austin Texas [Member] Represents the lease for laboratory facilities in Austin, Texas that expires July 2018. NasaRISK NasaRISK [Member] NasaRISK Interest paid on debt Interest Paid, Excluding Capitalized Interest, Operating Activities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Accumulated deficit Retained Earnings (Accumulated Deficit) Preferred stock, $0.001 par value; 5,000,000 shares authorized, no shares issued and outstanding as of March 31, 2020 and December 31, 2019 Preferred Stock, Value, Issued Variable Rate [Axis] Variable Rate [Axis] Cash and and cash equivalents, fair value Cash and Cash Equivalents, Fair Value Disclosure Security Exchange Name Security Exchange Name Accrued liabilities Increase (Decrease) in 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. Entity Tax Identification Number Entity Tax Identification Number Total common stock equivalents (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Debt principal Debt Instrument, Face Amount Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Additional paid-in capital Additional Paid in Capital, Common Stock Debt Prepayment Tranche [Axis] Debt Prepayment Tranche [Axis] Debt Prepayment Tranche [Axis] Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Write-down of excess supplies Inventory Reserve, Effect on Income, Net Inventory Reserve, Effect on Income, Net Equity Component [Domain] Equity Component [Domain] Selling and marketing Selling and Marketing Expense Trading Symbol Trading Symbol Minimum Minimum [Member] Document Transition Report Document Transition Report Schedule of fair value of assets acquired and liabilities assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Employee stock purchase plan Share-based Payment Arrangement, Option [Member] Investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Payment of finance lease liability Finance Lease, Principal Payments Balance Sheet Location [Domain] Balance Sheet Location [Domain] Line of credit Line of Credit [Member] Range [Domain] Statistical Measurement [Domain] 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] ESPP (in shares) Employee Stock [Member] Prosigna product technology Developed Product Technology [Member] Developed Product Technology Estimated useful life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities UnitedHealthcare United Healthcare [Member] Represents information pertaining to United Healthcare, a significant third-party payer. Income Statement [Abstract] Income Statement [Abstract] 2020 Lessee, Operating Lease, Liability, Payments, Due Year Two Balance Sheet Location [Axis] Balance Sheet Location [Axis] Security deposit Security Deposit