Entity Central Index Key Restricted cash fair value disclosure. Document and entity information. Document And Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Ex Transition Period Entity Ex Transition Period Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Accrued compensation current. Long-term debt excluding convertible promissory notes. Statement Of Financial Position [Abstract] ASSETS Assets [Abstract] CURRENT ASSETS: Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Accounts receivable, net of allowance of $1,963 and $1,772 as of March 31, 2019 and December 31, 2018, respectively Receivables Net Current Inventory Inventory Net Prepaid expenses and other current assets Prepaid Expense And Other Assets Current Total current assets Assets Current Property and equipment, net Property Plant And Equipment Net Restricted cash Restricted Cash Noncurrent Other assets Other Assets Noncurrent TOTAL ASSETS Assets LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT) Liabilities And Stockholders Equity [Abstract] CURRENT LIABILITIES: Liabilities Current [Abstract] Accounts payable Accounts Payable Current Accrued compensation Accrued Compensation Current Other accrued liabilities Other Accrued Liabilities Current Deferred revenue Deferred Revenue Current Current portion of long-term debt, net of discount of $693 and $617 as of March 31, 2019 and December 31, 2018, respectively Long Term Debt Current Total current liabilities Liabilities Current Other long-term liabilities Other Liabilities Noncurrent Related party convertible promissory notes (Note 8) Convertible Long Term Notes Payable Long-term debt, net of discount of $638 and $746 as of March 31, 2019 and December 31, 2018 Long Term Debt Excluding Convertible Promissory Notes TOTAL LIABILITIES Liabilities Commitments and Contingencies (Note 6) Commitments And Contingencies STOCKHOLDERS’ EQUITY (DEFICIT) Stockholders Equity [Abstract] Convertible preferred stock, $0.0001 par value; 10,000,000 shares authorized, and no shares issued and outstanding as of March 31, 2019 and December 31, 2018 Temporary Equity Carrying Amount Attributable To Parent Common stock, $0.0001 par value; 300,000,000 shares authorized as of March 31, 2019 and December 31, 2018; 40,767,012 and 40,677,012 shares issued and outstanding as of March 31, 2019 and December 31, 2018, respectively Common Stock Value Additional paid-in capital Additional Paid In Capital Common Stock Accumulated other comprehensive loss Accumulated Other Comprehensive Income Loss Net Of Tax Accumulated deficit Retained Earnings Accumulated Deficit TOTAL STOCKHOLDERS’ EQUITY (DEFICIT) Stockholders Equity TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT) Liabilities And Stockholders Equity Accounts receivable, allowance Allowance For Doubtful Accounts Receivable Current portion of long-term debt, discount Debt Instrument Unamortized Discount Current Long-term debt, discount Debt Instrument Unamortized Discount Noncurrent Temporary equity liquidation preference par or stated value per share. Convertible preferred stock at liquidation preference par value Temporary Equity Liquidation Preference Par Or Stated Value Per Share Convertible preferred stock, shares authorized Temporary Equity Shares Authorized Convertible preferred stock, shares issued Temporary Equity Shares Issued Convertible preferred stock, shares outstanding Temporary Equity Shares Outstanding Common stock, par value Common Stock Par Or Stated Value Per Share Common stock, shares authorized Common Stock Shares Authorized Common stock, shares issued Common Stock Shares Issued Common stock, shares outstanding Common Stock Shares Outstanding Income Statement [Abstract] Revenue Revenues Cost of revenue Cost Of Revenue Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Sales and marketing Selling And Marketing Expense Research and development Research And Development Expense General and administrative General And Administrative Expense Merger related expenses Business Combination Acquisition Related Costs Total operating expenses Operating Expenses Loss from operations Operating Income Loss Other expense, net: Nonoperating Income Expense [Abstract] Interest expense Interest Income Expense Nonoperating Net Other expense, net Other Nonoperating Income Expense Total other expense, net Nonoperating Income Expense Net loss before provision for income taxes Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Provision for income taxes Income Tax Expense Benefit Net loss attributable to common stockholders Net Income Loss Available To Common Stockholders Basic Net loss per share attributable to common stockholders, basic and diluted Earnings Per Share Basic And Diluted Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted Weighted Average Number Of Share Outstanding Basic And Diluted Statement Of Income And Comprehensive Income [Abstract] Net loss Net Income Loss Other comprehensive income (loss): Other Comprehensive Income Loss Tax [Abstract] Cumulative translation adjustment Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax Comprehensive loss Comprehensive Income Net Of Tax Statement Of Stockholders Equity [Abstract] Statement [Table] Statement [Table] Accumulated Other Comprehensive Income (Loss) Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid In Capital [Member] Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income [Member] Accumulated Deficit Retained Earnings [Member] Statement [Line Items] Statement [Line Items] Beginning balance, value Beginning balance, shares Shares Outstanding Release of restricted stock awards Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition Release of restricted stock awards, shares Stock Issued During Period Shares Restricted Stock Award Gross Stock-based compensation Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Other comprehensive gain Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Ending balance, value Ending balance, shares Purchases of property and equipment included in accounts payable. Statement Of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided By Used In Operating Activities [Abstract] Net loss Profit Loss 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] Depreciation and amortization Depreciation Depletion And Amortization Amortization of debt discounts and issuance costs Amortization Of Financing Costs And Discounts Stock-based compensation Allocated Share Based Compensation Expense Provision for bad debt Provision For Doubtful Accounts Changes in operating assets and liabilities: Increase Decrease In Operating Capital [Abstract] Accounts receivable Increase Decrease In Accounts Receivable Inventory Increase Decrease In Inventories Prepaid expenses and other assets Increase Decrease In Prepaid Deferred Expense And Other Assets Accounts payable Increase Decrease In Accounts Payable Accrued and other liabilities Increase Decrease In Accrued Liabilities And Other Operating Liabilities Deferred revenue Increase Decrease In Deferred Revenue Net cash used in operating activities Net Cash Provided By Used In Operating Activities CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided By Used In Investing Activities [Abstract] Purchases of property and equipment Payments To Acquire Property Plant And Equipment Net cash used in investing activities Net Cash Provided By Used In Investing Activities CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided By Used In Financing Activities [Abstract] Proceeds from related party convertible promissory notes, net Proceeds From Repayments Of Related Party Debt Proceeds from exercised stock options Proceeds From Stock Options Exercised Principal payments on long-term debt Repayments Of Long Term Debt Net cash provided by (used in) financing activities Net Cash Provided By Used In Financing Activities Effect of exchange rate changes on cash, cash equivalents and restricted cash Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations 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 CASH, CASH EQUIVALENTS AND RESTRICTED CASH — Beginning of period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CASH, CASH EQUIVALENTS AND RESTRICTED CASH — End of period SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: Supplemental Cash Flow Information [Abstract] Interest paid during the period Interest Paid Net SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING INFORMATION: Cash Flow Noncash Investing And Financing Activities Disclosure [Abstract] Purchase of property and equipment included in accounts payable Purchases Of Property And Equipment Included In Accounts Payable Discounts in connection with amendment of long-term debt Debt Issuance Costs Incurred During Noncash Or Partial Noncash Transaction Organization Consolidation And Presentation Of Financial Statements [Abstract] Nature of Operations Nature Of Operations Accounting Policies [Abstract] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Revenues [Abstract] Revenue Revenue From Contract With Customer [Text Block] Earnings Per Share [Abstract] Net Loss per Share Earnings Per Share [Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value Disclosures [Text Block] Balance sheet components. Balance Sheet Components [Abstract] Balance Sheet Components Supplemental Balance Sheet Disclosures [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Debt Disclosure [Abstract] Long-Term Debt Debt Disclosure [Text Block] Common stock reserved for issuance. Equity [Abstract] Common Stock Reserved For Issuance Common Stock Reserved For Issuance [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Stock Option Plan Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Liquidity. Liquidity Liquidity Policy [Text Block] Basis of Presentation Basis Of Accounting Policy Policy [Text Block] Principles of Consolidation Consolidation Policy [Text Block] Use of Estimates Use Of Estimates Cash, Cash Equivalents, and Restricted Cash Cash And Cash Equivalents Restricted Cash And Cash Equivalents Policy Segments Segment Reporting Policy Policy [Text Block] Concentration of Customers Concentration of Customers Concentration Of Customers Policy [Text Block] JOBS act accounting election. Jobs Act Accounting Election Jobs Act Accounting Election Policy [Text Block] Recently Adopted Accounting Standards New Accounting Pronouncements Policy Policy [Text Block] Recently issued accounting standards not yet adopted. Recently Issued Accounting Standards Not Yet Adopted Recently Issued Accounting Standards Not Yet Adopted Policy [Text Block] Schedule of reconciliation of cash, cash equivalents, and restricted cash. Schedule of Reconciliation of Cash, Cash Equivalents, and Restricted Cash Schedule Of Reconciliation Of Cash Cash Equivalents And Restricted Cash Table [Text Block] Adjustments for New Accounting Pronouncements Adjustments For New Accounting Pronouncements [Axis] Type of Adoption Type Of Adoption [Member] Topic 606 Accounting Standards Update201409 [Member] Impact on Financial Statements in Accordance with Topic 606 Schedule Of Condensed Financial Statements Table [Text Block] Tabular disclosure of estimated revenue expected to be recognized in future related to performance obligations unsatisfied or partially unsatisfied at period end. Summary of Estimated Revenue Expected to be Recognized in Future Related to Performance Obligations Unsatisfied or Partially Unsatisfied at Period End Summary Of Estimated Revenue Expected To Be Recognized In Future Related To Performance Obligations Unsatisfied Or Partially Unsatisfied At Period End Table [Text Block] Deferred Revenue (Remaining Performance Obligations) Deferred Revenue By Arrangement Disclosure [Text Block] Disaggregation of Revenue Geographic Regions and Nature of Product and Services Disaggregation Of Revenue Table [Text Block] Outstanding Shares of Common Stock Equivalents Excluded from Calculation of Diluted Net Loss per Share Attributable to Common Stockholders Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Text Block] Schedule for Levels of Fair Value Measurements of Cash Equivalents Fair Value By Balance Sheet Grouping [Text Block] Schedule of Inventory Schedule Of Inventory Current Table [Text Block] Schedule of Property and Equipment, Net Property Plant And Equipment [Text Block] Summary of Aggregate Future Minimum Lease Payments under Operating Leases Schedule Of Future Minimum Rental Payments For Operating Leases Table [Text Block] Schedule Principal Payments on Outstanding Borrowings Schedule Of Maturities Of Long Term Debt Table [Text Block] Schedule of common stock reserved for future issuance. Schedule of Common Stock Reserved for Issuance Schedule Of Common Stock Reserved For Future Issuance Table [Text Block] Summary of Recognized Stock-based Compensation Expense for Employees and Non-employees Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Text Block] Assumptions used in Fair Value of Option Estimated at Date of Grant using Black-Scholes-Merton Option Pricing Model Schedule Of Share Based Payment Award Stock Options Valuation Assumptions Table [Text Block] Summary of Stock Option Activity Schedule Of Share Based Compensation Stock Options Activity Table [Text Block] Nature of operations. Nature of operations. Nature Of Operations [Table] Nature Of Operations [Table] Long-term Debt, Type Longterm Debt Type [Axis] Long-term Debt, Type Longterm Debt Type [Domain] Unsecured convertible promissory notes. Unsecured Convertible Promissory Notes Unsecured Convertible Promissory Notes [Member] Business Acquisition Business Acquisition [Axis] Business Acquisition, Acquiree Business Acquisition Acquiree [Domain] Merger Agreement. Merger Agreement Merger Agreement [Member] Legal Entity Legal Entity [Axis] Entity Entity [Domain] Venus. Venus Venus [Member] EW Healthcare Partners. EW Healthcare Partners E W Healthcare Partners [Member] Fred Moll and Inter West Partners. Fred Moll and Inter West Partners Fred Moll And Inter West Partners [Member] Debt Instrument Debt Instrument [Axis] Debt Instrument, Name Debt Instrument Name [Domain] Note purchase agreement. Third Amendment Note Purchase Agreement [Member] Nonmonetary Transaction Type Nonmonetary Transaction Type [Axis] Nonmonetary Transaction Type Nonmonetary Transaction Type [Domain] Reverse stock split. Reverse Stock Split Reverse Stock Split [Member] Nature Of Operations [Line Items] Nature Of Operations [Line Items] Percentage of ownership acquired Business Acquisition Percentage Of Voting Interests Acquired Equity method investments amount Equity Method Investments Equity method investment price per share Share Price Amount of convertible promissory notes Debt Instrument Face Amount Conversion price of convertible promissory notes Debt Instrument Convertible Conversion Price1 Reverse stock split Stockholders Equity Reverse Stock Split Reverse stock split conversion ratio Stockholders Equity Note Stock Split Conversion Ratio1 Summary of significant accounting policies. Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Concentration Risk Type Concentration Risk By Type [Axis] Concentration Risk Type Concentration Risk Type [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Concentration Risk Benchmark Concentration Risk By Benchmark [Axis] Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Revenue Sales Revenue Net [Member] Accounts Receivable Accounts Receivable [Member] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Number of major customers. Number of major customers Number Of Major Customers Concentration Risk, Percentage Concentration Risk Percentage1 Restricted cash Restricted Cash Total cash, cash equivalents and restricted cash in the condensed consolidated statements of cash flows Number of operating segments Number Of Operating Segments Number of reportable segments Number Of Reportable Segments Cumulative-effect adjustment to accumulated deficit Cumulative Effect On Retained Earnings Tax1 Revenue Initial Application Period Cumulative Effect Transition [Table] Revenue Initial Application Period Cumulative Effect Transition [Table] Initial Application Period Cumulative Effect Transition Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition Initial Application Period Cumulative Effect Transition [Domain] Adjustments Difference Between Revenue Guidance In Effect Before And After Topic606 [Member] Balance Without ASC 606 Adoption Calculated Under Revenue Guidance In Effect Before Topic606 [Member] Revenue Initial Application Period Cumulative Effect Transition [Line Items] Revenue Initial Application Period Cumulative Effect Transition [Line Items] Gross profit Total operating expenses Loss from operations Net loss before provision for income taxes Net loss attributable to common stockholders Stockholders' deficit Disaggregation Of Revenue [Table] Disaggregation Of Revenue [Table] Product and Service Product Or Service [Axis] Product and Service Products And Services [Domain] ARTAS Systems. ARTAS Systems A R T A S Systems [Member] Balance Sheet Location Balance Sheet Location [Axis] Balance Sheet Location Balance Sheet Location [Domain] Prepaid and Other Current Assets Prepaid Expenses And Other Current Assets [Member] Other Assets Other Assets [Member] Disaggregation Of Revenue [Line Items] Disaggregation Of Revenue [Line Items] Revenue performace obligation, description of payment terms Revenue Performance Obligation Description Of Payment Terms Range Range [Axis] Range Range [Member] Minimum Minimum [Member] Maximum Maximum [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Start Date [Axis] Revenue, remaining performance obligation, expected timing of Satisfaction, period Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 Deferred revenue estimated revenue expected recognized in remainder of year. Deferred revenue estimated revenue expected recognized in year two. Deferred revenue estimated revenue expected recognized in year three. Deferred revenue estimated revenue expected recognized after year three. System related. System Related System Related [Member] Procedure based. Procedure- Based Procedure Based [Member] Service related fees. Service-Related Fees Service Related Fees [Member] 2019 Deferred Revenue Estimated Revenue Expected Recognized In Remainder Of Year 2020 Deferred Revenue Estimated Revenue Expected Recognized In Year Two 2021 Deferred Revenue Estimated Revenue Expected Recognized In Year Three 2022 and Thereafter Deferred Revenue Estimated Revenue Expected Recognized After Year Three Total Revenue Remaining Performance Obligation Remaining performance obligations description Revenue Practical Expedient Remaining Performance Obligation Description Unamortized deferred compensation assets current. Unamortized deferred compensation assets non current. Unamortized deferred compensation assets, short term Unamortized Deferred Compensation Assets Current Unamortized deferred compensation assets, long term Unamortized Deferred Compensation Assets Non Current Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent. Deferred Revenue Arrangement By Type [Table] Deferred Revenue Arrangement By Type [Table] Deferred Revenue Arrangement [Line Items] Deferred Revenue Arrangement [Line Items] Balance at the beginning of the period Contract With Customer Liability Additions Contract With Customer Liability Additions Recognition of deferred revenue Contract With Customer Liability Revenue Recognized Balance at the end of the period Less: Deferred revenue - current Contract With Customer Liability Current Deferred revenue - non-current Contract With Customer Liability Noncurrent Geographical Statement Geographical [Axis] Geographical Segment Geographical [Domain] United States UNITED STATES Europe and middle east. Europe And Middle East Europe And Middle East [Member] Asia Pacific Asia Pacific [Member] Rest of World. Rest Of World Rest Of World [Member] Total revenue Revenue From Contract With Customer Excluding Assessed Tax Systems. Systems Systems [Member] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Antidilutive Securities Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis] Antidilutive Securities, Name Antidilutive Securities Name [Domain] Options to Purchase Common Stock Employee Stock Option [Member] Warrants for common stock. Warrants for Common Stock Warrants For Common Stock [Member] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Total potential dilutive shares Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Fair Value By Balance Sheet Grouping [Table] Fair Value By Balance Sheet Grouping [Table] Asset Class Fair Value By Asset Class [Axis] Asset Class Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain] Money Market Account Money Market Funds [Member] Fair Value Hierarchy and NAV Fair Value By Fair Value Hierarchy Level [Axis] Fair Value Hierarchy and NAV Fair Value Measurements Fair Value Hierarchy [Domain] Quoted Prices in Active Markets using Identical Assets (Level 1) Fair Value Inputs Level1 [Member] Significant Other Observable Inputs (Level 2) Fair Value Inputs Level2 [Member] Significant Unobservable Inputs (Level 3) Fair Value Inputs Level3 [Member] Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Cash Equivalents Cash And Cash Equivalents Fair Value Disclosure Restricted cash Restricted Cash Fair Value Disclosure Total assets Assets Fair Value Disclosure Inventory Disclosure [Abstract] Raw materials Inventory Raw Materials Net Of Reserves Work-in-process Inventory Work In Process Net Of Reserves Finished goods Inventory Finished Goods Net Of Reserves Total inventory Property Plant And Equipment [Abstract] Equipment Machinery And Equipment Gross Computer hardware and software Capitalized Computer Software Gross Leasehold improvements Leasehold Improvements Gross Furniture and fixtures Furniture And Fixtures Gross Total property and equipment Property Plant And Equipment Gross Less: Accumulated depreciation and amortization Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Total property and equipment, net Operating lease office space area. Operating lease expiration date of office space area. Operating lease office space area. Commitment and contingencies. Commitments and contingencies. Commitments And Contingencies [Table] Commitments And Contingencies [Table] San Jose, California CALIFORNIA Counterparty Name Counterparty Name [Axis] Counterparty Name Repurchase Agreement Counterparty Name [Domain] Evolve Manufacturing Technologies Incorporation. Evolve Manufacturing Technologies, Inc. Evolve Manufacturing Technologies Incorporation [Member] Rassman Licensing Limited Liability Company. Rassman Licensing, LLC Rassman Licensing Limited Liability Company [Member] Research and Development Arrangement, Contract to Perform for Others, Type Research And Development Arrangement Contract To Perform For Others By Type [Axis] Research and Development Arrangement, Contract to Perform for Others, Type Research And Development Arrangement Contract To Perform For Others Type [Domain] License Agreement License Agreement Terms [Member] HSC Development Limited Liability Company. HSC Development, LLC H S C Development Limited Liability Company [Member] Commitment And Contingencies [Line Items] Commitment And Contingencies [Line Items] Operating lease office space area Operating Lease Office Space Area Operating lease manufacturing space area Operating Lease Manufacturing Space Operating lease expiration date of office space area Operating Lease Expiration Date Of Office Space Area 2019 (remaining 9 months) Operating Leases Future Minimum Payments Remainder Of Fiscal Year 2020 Operating Leases Future Minimum Payments Due In Two Years 2021 Operating Leases Future Minimum Payments Due In Three Years 2022 Operating Leases Future Minimum Payments Due In Four Years Total future minimum lease payments Operating Leases Future Minimum Payments Due Rent expense Operating Leases Rent Expense Net Number of master agreements. Effective date of master agreement for purchase of robotic device. Effective date of master agreement for purchase of kits used with robotic device. Initial term of master agreements. Renewal term of master agreements. Master agreements, term description. Purchase commitment remaining maximum amount committed. Number of master agreements Number Of Master Agreements Master agreement for purchase of robotic device, effective date Effective Date Of Master Agreement For Purchase Of Robotic Device Master agreement for purchase of kits used with robotic device, effective date Effective Date Of Master Agreement For Purchase Of Kits Used With Robotic Device Initial term of master agreements Initial Term Of Master Agreements Master agreements, renewal term Renewal Term Of Master Agreements Master agreements, term description Master Agreements Term Description Future purchase commitments Purchase Commitment Remaining Maximum Amount Committed Charge related to excess purchase commitments Long Term Purchase Commitment Amount Loss contingency accrual Loss Contingency Accrual Payments Decrease in loss contingency accrual Loss Contingency Accrual Carrying Value Period Increase Decrease License agreement termination date. One time payment of royalty related to license Payments For Royalties License agreement termination date License Agreement Termination Date Royalty expense Royalty Expense Number of common stock shares issued Stock Issued During Period Shares New Issues Number of complaints filed Loss Contingency New Claims Filed Number Number of debt instruments issued. Debt Instrument [Table] Debt Instrument [Table] 8% unsecured convertible promissory notes. 8% Unsecured Convertible Promissory Notes Eight Percentage Unsecured Convertible Promissory Notes [Member] Note Purchase Agreement Loan and security agreement. Loan and Security Agreement Loan And Security Agreement [Member] Variable Rate Variable Rate [Axis] Variable Rate Variable Rate [Domain] LIBOR London Interbank Offered Rate L I B O R [Member] Measurement Input Type Measurement Input Type [Axis] Measurement Input Type Measurement Input Type [Domain] Measurement Input, Share Price Measurement Input Share Price [Member] Measurement Input, Exercise Price Measurement Input Exercise Price [Member] Measurement Input, Risk Free Interest Rate Measurement Input Risk Free Interest Rate [Member] Measurement Input, Price Volatility Measurement Input Price Volatility [Member] Measurement Input, Expected Term Measurement Input Expected Term [Member] Measurement Input, Expected Dividend Rate Measurement Input Expected Dividend Rate [Member] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Other Income (Expense), Net Other Nonoperating Income Expense [Member] Third amendment. Third Amendment Third Amendment [Member] Debt Instrument, Redemption, Period Debt Instrument Redemption Period [Axis] Debt Instrument, Redemption, Period Debt Instrument Redemption Period [Domain] On Or Prior To May 1, 2019 Debt Instrument Redemption Period One [Member] After May 1, 2019 But On Or Prior To May 1, 2020 Debt Instrument Redemption Period Two [Member] After May 1, 2020 But On Or Prior To May 1, 2021 Debt Instrument Redemption Period Three [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Debt instrument, borrowed amount Number of convertible promissory notes issued Number Of Debt Instruments Issued Debt Instrument, full repayment date Debt Instrument Maturity Date Debt instrument, interest rate, stated percentage Debt Instrument Interest Rate Stated Percentage Interest payable noncurrent. Gross proceeds from conversion of convertable securities Stock Issued During Period Value Conversion Of Convertible Securities Accrued interest Interest Payable Noncurrent Debt instrument final payment amount upon maturity. Debt instrument accrued interest and prepayment fees. Debt instrument, term Debt Instrument Term Proceeds from loan used to repay debt Proceeds From Loans Debt instrument, final payment amount upon maturity Debt Instrument Final Payment Amount Upon Maturity Debt instrument, outstanding balance repaid Repayments Of Debt Debt instrument accrued interest and prepayment fees Debt Instrument Accrued Interest And Prepayment Fees Debt instrument, basis spread on variable rate Debt Instrument Basis Spread On Variable Rate1 Debt instrument, outstanding balance Long Term Debt Debt instrument, accrued interest Longterm Debt Percentage Bearing Variable Interest Amount Debt instrument, interest rate Long Term Debt Percentage Bearing Variable Interest Rate Debt instrument interest only period. Debt instrument additional interest only period. Debt instrument, interest only period Debt Instrument Interest Only Period Debt instrument, additional interest only period Debt Instrument Additional Interest Only Period Debt conversion, warrants issued Debt Conversion Converted Instrument Warrants Or Options Issued1 Exercise price of warrants Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 Debt instrument, term Warrants And Rights Outstanding Term Fair value of warrants issued Warrants Not Settleable In Cash Fair Value Disclosure Warrants and Rights Outstanding, Measurement Input Warrants And Rights Outstanding Measurement Input Debt instrument unamortized debt discount and fee amount. Debt instrument transaction cost related amount. Debt instrument, unamortized debt discount and fee amount Debt Instrument Unamortized Debt Discount And Fee Amount Debt instrument transaction cost related amount Debt Instrument Transaction Cost Related Amount Fee paid to lenders. Class of warrant or right cancelled. Fee paid to lenders Fee Paid To Lenders Cancellation of warrants Class Of Warrant Or Right Cancelled Debt instrument default interest percentage. Debt instrument, default interest percentage Debt Instrument Default Interest Percentage Debt instrument final fee payable increased amount. Debt instrument final fee payable increased amount Debt Instrument Final Fee Payable Increased Amount Percentage of principal amount of borrowings being prepaid Debt Instrument Redemption Price Percentage Of Principal Amount Redeemed Percentage of prepayment premium Debt Instrument Redemption Price Percentage 2019 (remaining 9 months) Long Term Debt Maturities Repayments Of Principal Remainder Of Fiscal Year 2020 Long Term Debt Maturities Repayments Of Principal In Year Two 2021 Long Term Debt Maturities Repayments Of Principal In Year Three 2022 Long Term Debt Maturities Repayments Of Principal In Year Four 2023 Long Term Debt Maturities Repayments Of Principal In Year Five Total Debt Instrument Carrying Amount Less debt discount Deferred Finance Costs Net Less current portion Non-current portion Long Term Debt Noncurrent Convertible promissory notes Long-term debt Total non-current portion Schedule Of Stock By Class [Table] Schedule Of Stock By Class [Table] Class Of Stock [Line Items] Class Of Stock [Line Items] Outstanding common stock warrants Class Of Warrant Or Right Outstanding Outstanding and issued stock options Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number Shares reserved for future option grants Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Total common stock reserved for issuance Common Stock Capital Shares Reserved For Future Issuance Stock option plan effective date. Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Plan Name Plan Name [Axis] Plan Name Plan Name [Domain] Two thousand seventeen equity incentive plan. 2017 Plan Two Thousand Seventeen Equity Incentive Plan [Member] Title of Individual Title Of Individual [Axis] Relationship to Entity Title Of Individual With Relationship To Entity [Domain] Interim Chief Commercial Officer. Keith Sullivan Interim Chief Commercial Officer [Member] Award Type Award Type [Axis] Equity Award Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Restricted Stock Awards Restricted Stock [Member] Chief Financial Officer Chief Financial Officer [Member] Restricted Stock Unit Restricted Stock Units R S U [Member] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Effective date of plan Stock Option Plan Effective Date Cost of Revenue Cost Of Sales [Member] Sales and Marketing Selling And Marketing Expense [Member] Research and Development Research And Development Expense [Member] General and Administrative General And Administrative Expense [Member] Employees and nonemployees. Employees and Non-employees Employees And Nonemployees [Member] Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology [Abstract] Expected term (years) Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 Risk-free interest rate Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Risk-free interest rate, minimum Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Minimum Risk-free interest rate, maximum Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Maximum Expected volatility Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Expected volatility, minimum Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Minimum Expected volatility, maximum Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Maximum Dividend yield Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Roll Forward Number of Shares, Outstanding, Beginning Balance Number of Shares, Options granted Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross Number of Shares, Options cancelled Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period Number of Shares, Outstanding, Ending Balance Number of Shares, Vested and expected to vest Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number Number of Shares, Exercisable Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number Weighted-Average Exercise Price Per Share, Outstanding, Beginning Balance Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Weighted-Average Exercise Price Per Share, Options granted Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price Weighted-Average Exercise Price Per Share, Options cancelled Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price Weighted-Average Exercise Price Per Share, Outstanding, Ending Balance Weighted-Average Exercise Price Per Share, Vested and expected to vest Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price Weighted-Average Exercise Price Per Share, Exercisable Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price Weighted-Average Remaining Contractual Term, Outstanding Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 Weighted-Average Remaining Contractual Term, Vested and expected to vest Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 Weighted-Average Remaining Contractual Term, Exercisable Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 Aggregate Intrinsic Value, Outstanding Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value Aggregate Intrinsic Value, Vested and expected to vest Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value Aggregate Intrinsic Value, Exercisable Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 Weighted-average grant date fair value of options granted Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value Number of Shares, Options exercised Stock Issued During Period Shares Stock Options Exercised Total intrinsic value of options exercised Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value Unamortized stock-based compensation Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options Unamortized stock-based compensation, weighted-average period Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 Term of office. Share-based compensation arrangement by share-based payment award, first vest date. Term of office Term Of Office Number of stock awards granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Vesting rights description Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Rights Vesting percentage Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage First vest date Share Based Compensation Arrangement By Share Based Payment Award First Vest Date Unrecognized compensation expense, net of estimated forfeitures Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Expense recognition period Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 Aggregate intrinsic value of the RSUs outstanding Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Aggregate Intrinsic Value Outstanding Expected effective income tax rate continuing operations. Effective income tax rate Effective Income Tax Rate Continuing Operations Effective income tax rate, expected rate for fiscal year Expected Effective Income Tax Rate Continuing Operations Unrecognized tax benefits Unrecognized Tax Benefits Interest and penalties related to uncertain tax positions Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued