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Total operating and capital leases and purchase commitments Operating and Capital Leases and Purchase Commitments, Future Minimum Payments Due Operating and Capital Leases and Purchase Commitments, Future Minimum Payments Due 2018 Operating and Capital Leases and Purchase Commitments, Future Minimum Payments Due, Current Operating and Capital Leases and Purchase Commitments, Future Minimum Payments Due, Current 2019 Operating and Capital Leases and Purchase Commitments, Future Minimum Payments, Due In Two Years Operating and Capital Leases and Purchase Commitments, Due In Two Years 2020 Operating and Capital Leases and Purchase Commitments, Future Minimum Payments, Due In Three Years Operating and Capital Leases and Purchase Commitments, Future Minimum Payments, Due In Three Years 2021 Operating and Capital Leases and Purchase Commitments, Future Minimum Payments, Due In Four Years Operating and Capital Leases and Purchase Commitments, Future Minimum Payments, Due In Four Years 2022 Operating and Capital Leases and Purchase Commitments, Future Minimum Payments Due in Five Years Operating and Capital Leases and Purchase Commitments, Future Minimum Payments Due in Five Years More than 5 Years Operating and Capital Leases and Purchase Commitments, Future Minimum Payments, Due Thereafter Operating and Capital Leases and Purchase Commitments, Future Minimum Payments, Due Thereafter Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Employee stock purchase plan and service-based stock options Employee Stock And Employee Stock Option [Member] Employee Stock And Employee Stock Option [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of goods sold Cost of Sales [Member] Research and development Research and Development Expense [Member] General, selling and administrative Selling, General and Administrative Expenses [Member] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Total non-cash stock-based compensation expense Allocated Share-based Compensation Expense Accrued expenses Accrued Liabilities, Current [Abstract] Bonus Accrued Bonuses, Current Employee related accruals Employee-related Liabilities, Current Other accrued expenses Accrued Expenses, Other, Current Represents other accrued expenses, current. Accrued expenses Statement of Comprehensive Income [Abstract] Foreign currency translation Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Earnings Per Share [Abstract] Net Loss Per Common Share Earnings Per Share [Text Block] Equity [Abstract] Preferred Stock Preferred Stock [Text Block] Stockholders' Equity Note [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Domain] Sale of Stock [Domain] Public Stock Offering Public Stock Offering [Member] Public Stock Offering [Member] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Cowen and Company, LLC Cowen and Company, LLC [Member] Cowen and Company, LLC [Member] Maximum Maximum [Member] Common Stock Common Class A [Member] Shareholders' Equity Class of Stock [Line Items] Percentage of gross proceeds payable as commission (up to) Percentage of Gross Proceeds Payable as Commission Represents the percentage of gross proceeds payable as commission. 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Expected Term Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding at the beginning of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Outstanding at the end of the period (in shares) Exercisable at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Outstanding at the beginning of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Expired (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Forfeited or expired (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Outstanding at the end of the period (in dollars per share) Exercisable at the end of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted Average Remaining Contractual Term Share Based Compensation Arrangement by Share Based Payment Award Options, Weighted Average Remaining Contractual Term [Abstract] Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Share Based Compensation Arrangement By Share Based Payment Award Options Aggregate Intrinsic Value [Abstract] Share Based Compensation Arrangement By Share Based Payment Award Options Aggregate Intrinsic Value [Abstract] Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, 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September 2016 Warrants Warrants Issued In September 2016 [Member] Warrants Issued In September 2016 [Member] Measurement Input Type [Axis] Measurement Input Type [Axis] Measurement Input Type [Domain] Measurement Input Type [Domain] Closing stock price Measurement Input, Share Price [Member] Expected dividend yield Measurement Input, Expected Dividend Rate [Member] Expected stock price volatility Measurement Input, Price Volatility [Member] Risk-free interest rate Measurement Input, Risk Free Interest Rate [Member] Common Stock Stock Purchase Warrants Class of Warrant or Right [Line Items] Exercise price (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Total shares issuable on exercise Class of Warrant or Right, Number of Securities Called by Warrants or Rights Proceeds from issuance of warrants Warrants and Rights Outstanding Warrants and Rights Outstanding, Measurement Input Share Price Share Price Exercise of warrants resulting in the issuance of common stock (in shares) Warrants outstanding (in shares) Class of Warrant or Right, Outstanding Expected life (years) Warrants and Rights Outstanding, Term Fair Value Disclosures [Abstract] Summary of valuation of the Company's investments and financial instruments that are measured at fair value on a recurring basis Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] Summary of change in estimated fair values of warrant liabilities Schedule of Change in Estimated Fair Value of Warrant Liabilities [Table Text Block] Tabular disclosure of change in the estimated fair value of the warrant liabilities. Schedule of Collaborative Arrangements and Non-collaborative Arrangement Transactions [Table] Schedule of Collaborative Arrangements and Non-collaborative Arrangement Transactions [Table] Licenses, Royalties and Collaborative Agreements and Commitments Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] Purchase obligation, due in second year Purchase obligation, renewal option, term Purchase Obligation, Renewal Option, Term Purchase Obligation, Renewal Option, Term Purchase obligation, automatic renewal, term Purchase Obligation, Automatic Renewal, Term Purchase Obligation, Automatic Renewal, Term Landlord contributions toward tenant improvements Incentive from Lessor Tenant improvements Deferred Rent Credit Rent expense Operating Leases, Rent Expense, Net Concentration of Credit Risk Concentration Risk Disclosure [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Business Acquisition [Line Items] Business Acquisition [Line Items] Number of reportable segments Number of Reportable Segments Net loss Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Selected Balance Sheet Components Supplemental Balance Sheet Disclosures [Text Block] Employee Savings Plan Pension and Other Postretirement Benefits Disclosure [Text Block] Fair Value Measurements Fair Value Disclosures [Text Block] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Commercial paper Commercial Paper, Not Included with Cash and Cash Equivalents [Member] US Government Debt Securities US Government Debt Securities [Member] Asset-backed Securities Corporate Note Securities Corporate Note Securities [Member] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Recurring Fair Value, Measurements, Recurring [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Other assets Other Assets [Member] Liabilities that are measured at fair value on a recurring basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Interest Receivable and Other Assets Interest Receivable Money market funds Cash and Cash Equivalents, Fair Value Disclosure Repurchase agreements Securities Sold under Agreements to Repurchase, Asset Debt securities, fair value Assets, fair value Assets, Fair Value Disclosure Warrant liabilities Change in the estimated fair value of warrant liabilities Warrants and Rights [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of the period. Balance at the beginning of the period Increase in fair value (net of expired warrants) Warrant exercise Balance at the end of the period Organization Nature of Operations [Text Block] Reconciliation of income taxes computed using the federal statutory rate to the taxes reported in consolidated statements of operations Effective Income Tax Rate Reconciliation, Amount [Abstract] Loss before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Federal statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Taxes computed at federal statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount State taxes (net of federal benefit) Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Nondeductible stock compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount Federal and State Rate Change Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Reported income taxes Income Tax Expense (Benefit) Deferred tax assets Deferred Tax Assets, Net [Abstract] Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Employee benefits and stock compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits Research and development costs Deferred Tax Assets, Research and Development Costs Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from research and development costs. Fixed assets Deferred Tax Assets, Property, Plant and Equipment Inventory reserve Deferred Tax Assets, Inventory Other, net Deferred Tax Assets, Other Total deferred tax assets Deferred Tax Assets, Gross Valuation allowance Deferred Tax Assets, Valuation Allowance Net deferred tax assets Deferred Tax Assets, Net Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Recent Accounting Pronouncements New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Schedule of fair value of securities, not including cash Debt Securities, Available-for-sale [Table Text Block] Summary of income (loss) before income taxes for U.S. and non-U.S. operations Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Schedule of reconciliation of income taxes computed using the federal statutory rate to the taxes reported in consolidated statements of operations Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of deferred tax assets Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of quarterly financial information Quarterly Financial Information [Table Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2014-09 [Member] Accounting Standards Update 2014-09 [Member] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Domain] Contract with Customer, Basis of Pricing [Domain] Fixed-price Contract [Member] Fixed-price Contract [Member] Time-and-materials Contract [Member] Time-and-materials Contract [Member] Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Sales Channel, Through Intermediary [Member] Sales Channel, Through Intermediary [Member] Sales Channel, Directly to Consumer [Member] Sales Channel, Directly to Consumer [Member] Revenue, Rights Granted [Member] Revenue, Rights Granted [Member] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Implants [Member] Implants [Member] Implants [Member] Biopsy Kits [Member] Biopsy Kits [Member] Biopsy Kits [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Product sales, net Revenue from Contract with Customer, Excluding Assessed Tax Income Statement [Abstract] Other Other Revenue Other Revenue Total revenue Cost of product sales Cost of Goods and Services Sold Gross profit Research and development Research and Development Expense Selling, general and administrative Selling, General and Administrative Expense Loss on impairment of intangible asset Total operating expenses Operating Expenses Loss from operations Other income (expense): Other Nonoperating Income (Expense) [Abstract] Increase in fair value of warrants Loss on extinguishment of debt Interest income Investment Income, Interest Interest expense Other Nonoperating Income (Expense) Other income (expense) Interest Expense Total other (expense) income Nonoperating Income (Expense) Net loss Weighted average number of common shares outstanding (Basic and Diluted) (in shares) Series B voting convertible preferred stock Series B-1 non-voting convertible preferred stock Series B1 Preferred Stock [Member] Convertible preferred shares with no voting rights, reported as temporary equity not forming the part of equity. Preferred Class A and Class B Preferred Class A And Class B [Member] Preferred Class A And Class B [Member] Series B Convertible Preferred Stock Number of common shares sold (in shares) Offering price per share (in dollars per share) Stock Issued During Period Offering Price Per Share Represents the offering price per share of preferred stock issued during the period. Period of closing of offering after which shares are convertible Preferred Stock, Period of Closing of Offering after which Shares are Convertible Represents the period of closing of offering after which shares are convertible. Conversion price per share (in dollars per share) Preferred Stock Conversion Price Per Share Represents the conversion price per share of convertible preferred stock. Conversion ratio, the number of shares of common stock received per share of convertible preferred stock (in shares) Convertible Preferred Stock Conversion Ratio, Shares Represents, in the form of a ratio, the number of shares of common stock received in conversion per share of convertible preferred stock. Shares converted (in shares) Conversion of Stock, Shares Converted Accumulated shares but undeclared dividends (in shares) Accumulated Undeclared Dividends Shares Represents the accumulated shares but undeclared dividends related to convertible preferred stock. Shares issued upon conversion (in shares) Conversion of Stock, Shares Issued Products and Services [Table] Products and Services [Table] Product Information [Line Items] Product Information [Line Items] Debt Debt Disclosure [Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Equipment and computers Equipment And Computers [Member] Represents information pertaining to equipment and computers. Furniture and fixtures Building improvements and leasehold improvements Building Improvements And Leasehold Improvements [Member] Represents information pertaining to building improvements and leasehold improvements. Valuation Allowances And Reserves Period [Axis] Valuation Allowances And Reserves Period [Axis] Valuation Allowances And Reserves Period [Axis] Valuation Allowances And Reserves Period [Domain] Valuation Allowances And Reserves Period [Domain] [Domain] for Valuation Allowances And Reserves Period [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Change in Accounting Estimate by Type [Axis] Change in Accounting Estimate by Type [Axis] Change in Accounting Estimate, Type [Domain] Change in Accounting Estimate, Type [Domain] Property, Plant and Equipment Useful lives Property, Plant and Equipment, Useful Life Principles of Consolidation Consolidation, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Inventory Inventory, Policy [Policy Text Block] Accounts Receivable Receivables, Policy [Policy Text Block] Property, Plant and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Intangible Assets and Other Long Lived Assets Intangible Assets, Finite-Lived, Policy [Policy Text Block] Research and Development Expense Research and Development Expense, Policy [Policy Text Block] Stock-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Comprehensive Loss Comprehensive Income, Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Net Loss Per Share Attributable to Common Shareholders Earnings Per Share, Policy [Policy Text Block] Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Warrants Warrants [Policy Text Block] Disclosure of accounting policy for warrants. Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Stock Purchase Warrants Warrants and Rights Note Disclosure [Text Block] The entire disclosure for warrants including description, amounts outstanding, fair value calculation and estimates. Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Federal Domestic Tax Authority [Member] State State and Local Jurisdiction [Member] Income Tax Authority, Name [Axis] Income Tax Authority, Name [Axis] Income Tax Authority, Name [Domain] Income Tax Authority, Name [Domain] Internal Revenue Service Internal Revenue Service (IRS) [Member] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Projected annual limitation on the use of the net operating losses that existed prior to September 17, 2014 Operating Loss Carryforwards Limitations On Use Projected Annual Limitation On Use Of Net Operating Losses The limitation on the use of operating loss carryforwards available to reduce future taxable income. Net operating loss carryforwards Operating Loss Carryforwards Increase (decrease) in valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Tax Cuts and Jobs Act of 2017, incomplete accounting, change in tax rate, deferred tax asset, provisional income tax expense Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense Cash Equivalents and Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Net Loss Per Share Attributable to Common Shareholders Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Accumulated undeclared dividends Accumulated Undeclared Dividends Represents the undistributed shares to be used for payment of undeclared dividends of convertible preferred stock. Document and Entity Information Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Public Float Entity Public Float Shareholders' Equity Stockholders' Equity Note Disclosure [Text Block] U.S. loss Non U.S. loss Foreign Tax Authority [Member] Loss before income taxes Issuance of stock, issuance cost Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Schedule of warrants outstanding Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] Schedule of assumptions used in calculating estimated fair value of warrants Schedule of Class of Warrant or Right Valuation Assumptions [Table Text Block] Tabular disclosure of the significant assumptions used during the period to estimate the fair value of warrant liabilities, including, but not limited to: (a) expected term of instruments, (b) expected volatility of the entity's shares, (c) closing stock price, (d) risk-free rate, and (e) dividend rate. Schedule of non-cash stock-based compensation expense Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of weighted average assumptions used to estimate fair value of each service-based stock option grant Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Summary of activity for service-based stock options Share-based Compensation, Stock Options, Activity [Table Text Block]