Entity Central Index Key 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 Statement Of Financial Position [Abstract] Assets Assets [Abstract] Current assets: Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Short-term marketable securities Available For Sale Securities Debt Securities Current Accounts receivable Accounts Receivable Net Current 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 Right of use asset - operating lease Operating Lease Right Of Use Asset Restricted cash Restricted Cash Noncurrent Other assets Other Assets Noncurrent Total assets Assets Liabilities and Stockholders' Equity Liabilities And Stockholders Equity [Abstract] Current liabilities: Liabilities Current [Abstract] Accounts payable Accounts Payable Current Accrued expenses Accrued Liabilities Current Deferred revenue Contract With Customer Liability Current Deferred rent Deferred Rent Credit Current Lease liability - operating lease Operating Lease Liability Current Finance lease obligations Finance Lease Liability Current Total current liabilities Liabilities Current Long-term liabilities: Liabilities Noncurrent [Abstract] Deferred rent, net of current portion Deferred Rent Credit Noncurrent Deferred revenue, net of current portion Contract With Customer Liability Noncurrent Lease liability - operating lease, net of current portion Operating Lease Liability Noncurrent Finance lease obligations, net of current portion Finance Lease Liability Noncurrent Total long-term liabilities Liabilities Noncurrent Commitments and contingencies (Note 11) Commitments And Contingencies Stockholders' Equity Stockholders Equity [Abstract] Preferred stock, $0.001 par value 5,000,000 shares authorized, none issued and outstanding as of March 31, 2019 and December 31, 2018 Preferred Stock Value Common stock, $0.001 par value 250,000,000 shares authorized as of March 31, 2019 and December 31, 2018. 25,388,643 and 25,401,479 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 Stockholders Equity Total liabilities and stockholders' equity Liabilities And Stockholders Equity Preferred stock, par value Preferred Stock Par Or Stated Value Per Share Preferred stock, Shares Authorized Preferred Stock Shares Authorized Preferred stock, Shares Issued Preferred Stock Shares Issued Preferred stock, Shares Outstanding Preferred Stock Shares Outstanding Common stock, par value Common Stock Par Or Stated Value Per Share Common stock, authorized Common Stock Shares Authorized Common stock, Issued Common Stock Shares Issued Common stock, outstanding Common Stock Shares Outstanding Income Statement [Abstract] Revenue Revenues Operating expenses: Operating Expenses [Abstract] Research and development Research And Development Expense General and administrative General And Administrative Expense Total operating expenses Operating Expenses Loss from operations Operating Income Loss Other income (expense): Nonoperating Income Expense [Abstract] Interest and investment income Investment Income Nonoperating Interest expense Interest Expense Other expense Other Nonoperating Income Expense Other income (expense), net Nonoperating Income Expense Net loss Net Income Loss Net loss per share attributable to common shareholders - basic and diluted Earnings Per Share Basic And Diluted Weighted-average common shares used in computing net loss per share attributable to common shareholders - basic and diluted Weighted Average Number Of Share Outstanding Basic And Diluted Comprehensive loss: Comprehensive Income Net Of Tax [Abstract] Net loss Net unrealized gains (losses) on marketable securities Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax Comprehensive loss Comprehensive Income Net Of Tax Statement Of Stockholders Equity [Abstract] Statement [Table] Statement [Table] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock $0.001 Par Common Stock [Member] Additional Paid-in Capital Additional Paid In Capital [Member] Other Accumulated Comprehensive Income Accumulated Other Comprehensive Income [Member] Accumulated Deficit Retained Earnings [Member] Adjustments for New Accounting Pronouncements Adjustments For New Accounting Pronouncements [Axis] Type of Adoption Type Of Adoption [Member] ASU 2014-09 (ASC 606) Accounting Standards Update201409 [Member] Statement [Line Items] Statement [Line Items] Balance Balance (in Shares) Shares Outstanding Effect of adoption of ASU Cumulative Effect On Retained Earnings Net Of Tax1 Sale of common stock Stock Issued During Period Value New Issues Sale of common stock, shares Stock Issued During Period Shares New Issues Cancellation of restricted stock Stock Issued During Period Shares Restricted Stock Award Forfeited Equity-based compensation expense Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Unrealized gain (loss) on securities Balance Balance (in Shares) Increase Decrease in Operating Lease Liability. Allowance for tenant improvements. Noncash purchase of property, plant and equipment in accounts payable and accrued liabilities adjustments. Cash Flow Noncash Investing Disclosure [Abstract] Cash Flow Noncash Financing Activities Disclosure [Abstract] 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 And Amortization Loss on disposal of property and equipment Gain Loss On Sale Of Property Plant Equipment Equity-based compensation expense Share Based Compensation Accretion/amortization of investment securities Accretion Amortization Of Discounts And Premiums Investments Changes in operating assets and liabilities: Increase Decrease In Operating Capital [Abstract] Accounts receivable Increase Decrease In Accounts Receivable Prepaid expenses and other current assets Increase Decrease In Prepaid Deferred Expense And Other Assets Accounts payable and accrued expenses Increase Decrease In Accounts Payable And Accrued Liabilities Deferred revenue Increase Decrease In Contract With Customer Liability Operating lease liability Increase Decrease In Operating Lease Liability Deferred rent Increase Decrease In Deferred Liabilities Other assets Increase Decrease In Other Operating Assets 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 marketable securities Payments To Acquire Available For Sale Securities Debt Proceeds from maturity of marketable securities Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities Purchases of property and equipment Payments To Acquire Property Plant And Equipment Net cash provided by (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] Payments on finance lease obligations Finance Lease Principal Payments Proceeds from sale of common stock, net of issuance costs Proceeds From Issuance Of Common Stock Net cash (used in) provided by financing activities Net Cash Provided By Used In Financing Activities Net increase (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 at beginning of period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations Cash, cash equivalents and restricted cash at end of period Supplemental disclosure of non-cash investing activities: Cash Flow Noncash Investing Disclosure [Abstract] Landlord funded allowance for tenant improvements Allowance For Tenant Improvements Property and equipment purchases included in accounts payable and accrued expenses Noncash Purchase Of Property Plant And Equipment In Accounts Payable And Accrued Liabilities Adjustments Supplemental disclosure of non-cash financing activities: Cash Flow Noncash Financing Activities Disclosure [Abstract] Cash paid for interest Interest Paid Net Organization Consolidation And Presentation Of Financial Statements [Abstract] Nature of Business Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] Accounting Policies [Abstract] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Fair Value Disclosures [Abstract] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Available for sale securities disclosure. Investments Debt And Equity Securities [Abstract] Available-for-Sale Investments Available For Sale Securities Disclosure [Text Block] Property Plant And Equipment [Abstract] Property and Equipment, Net Property Plant And Equipment Disclosure [Text Block] Payables And Accruals [Abstract] Accrued Expenses Accounts Payable Accrued Liabilities And Other Liabilities Disclosure Current [Text Block] Equity [Abstract] Common Stock Stockholders Equity Note Disclosure [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Equity-based Compensation and Equity Incentive Plans Disclosure Of Compensation Related Costs Share Based Payments [Text Block] AbbVie Collaboration Agreement Collaborative Arrangement Disclosure [Text Block] Earnings Per Share [Abstract] Net Loss per Share Earnings Per Share [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Basis of Presentation Basis Of Accounting Policy Policy [Text Block] Principles of Consolidation Consolidation Policy [Text Block] Recently adopted accounting pronouncements. Recently Adopted Accounting Pronouncements Recently Adopted Accounting Pronouncements Policy [Text Block] Recently Issued Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Schedule of Company's Classified Assets Measured at Fair Value on Recurring Basis Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis Table [Text Block] Summary of Available-for-Sale Securities Held Schedule Of Available For Sale Securities Reconciliation Table [Text Block] Schedule of Property and Equipment, Net Property Plant And Equipment [Text Block] Schedule of Accrued Expenses Schedule Of Accrued Liabilities Table [Text Block] Plan Name Plan Name [Axis] Plan Name Plan Name [Domain] Long term incentive plan 2015 and 2017. 2015 and 2017 Plan Long Term Incentive Plan2015 And2017 [Member] Schedule of Stock Option Activity Schedule Of Share Based Compensation Stock Options Activity Table [Text Block] Schedule of Restricted Common Stock Activity Nonvested Restricted Stock Shares Activity Table [Text Block] Schedule of Equity-based Compensation Expenses Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Text Block] Schedule of Equity-based Compensation Expenses by Award Type Disclosure Of Share Based Compensation Arrangements By Share Based Payment Award [Text Block] Schedule of Potentially Common Shares Excluded from Calculation of Net Loss Per share Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Text Block] Components of Lease Cost for Operating and Finance Leases Lease Cost Table [Text Block] Lessee weighted average remaining lease term and weighted average discount rate. Summary of Weighted Average Remaining Lease Term and Weighted Average Discount Rate for Operating and Finance Leases Lessee Weighted Average Remaining Lease Term And Weighted Average Discount Rate Table [Text Block] Lessee, operating and finance lease, liability, maturity. Summary of Maturity of Lease Liabilities for Operating and Finance Leases Lessee Operating And Finance Lease Liability Maturity Table [Text Block] Schedule of future minimum lease payments under operating and capital leases table text block. Schedule of Aggregate Future Lease Payments for Operating and Capital Leases Schedule Of Future Minimum Lease Payments Under Operating And Capital Leases Table [Text Block] Cash, cash equivalents, and marketable securities Cash Cash Equivalents And Short Term Investments Lease, practical expedients, package Lease Practical Expedients Package Lessee, operating lease, existence of option to extend Lessee Operating Lease Existence Of Option To Extend Lessee, operating lease, option to extend Lessee Operating Lease Option To Extend Operating lease, right-of-use asset Operating lease, lease liability Operating Lease Liability Fair Value Asset Measured On Recurring Basis [Line Items] Fair Value Asset Measured On Recurring Basis [Table] Fair Value Asset Measured On Recurring Basis [Table] Fair Value Asset Measured On Recurring Basis [Table] Measurement Frequency Fair Value By Measurement Frequency [Axis] Fair Value, Measurement Frequency Fair Value Measurement Frequency [Domain] Recurring Fair Value Measurements Recurring [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 for 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] Investment Type Investment Type [Axis] Investments Investment Type Categorization [Member] U.S. Government Agency Securities and Treasuries U S Treasury And Government Shortterm Debt Securities [Member] Financial Instrument Financial Instrument [Axis] Financial Instruments Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain] Corporate debt securities Corporate Debt Securities [Member] Cash and Cash Equivalents Cash And Cash Equivalents [Axis] Cash and Cash Equivalents Restricted Cash And Cash Equivalents Cash And Cash Equivalents [Member] Money market funds Money Market Funds [Member] Fair Value Asset Measured On Recurring Basis [Line Items] Fair Value Asset Measured On Recurring Basis [Line Items] Cash and Cash Equivalents Cash And Cash Equivalents Fair Value Disclosure Short-term investments Investments Fair Value Disclosure Total assets Assets Fair Value Disclosure Debt Securities Available For Sale [Table] Debt Securities Available For Sale [Table] U.S. government agency and treasury securities U S Treasury And Government [Member] U.S. government agency securities U S Government Agencies Debt Securities [Member] Schedule of Available-for-sale Securities [Line Items] Schedule Of Available For Sale Securities [Line Items] Amortized cost Available For Sale Debt Securities Amortized Cost Basis Gross unrealized gains Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax Gross unrealized losses Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax Fair Value Available For Sale Securities Debt Securities Other than temporary impairment losses investments number debt securities available for sale. Number of investments in unrealized loss position Debt Securities Available For Sale Unrealized Loss Position Number Of Positions Number of investments in unrealized loss position, more than twelve months Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions Aggregate fair value of securities in unrealized loss position Debt Securities Available For Sale Unrealized Loss Position Number of securities with other than temporary impairment Other Than Temporary Impairment Losses Investments Number Debt Securities Available For Sale Schedule Of Property Plant And Equipment [Table] Schedule Of Property Plant And Equipment [Table] Property, Plant and Equipment, Type Property Plant And Equipment By Type [Axis] Property, Plant and Equipment, Type Property Plant And Equipment Type [Domain] Laboratory Equipment Equipment [Member] Computer and office equipment. Computer and Office Equipment Computer And Office Equipment [Member] Furniture and Fixtures Furniture And Fixtures [Member] Leasehold Improvements Leasehold Improvements [Member] Construction in Progress Construction In Progress [Member] Property Plant And Equipment [Line Items] Property Plant And Equipment [Line Items] Property and equipment, gross Property Plant And Equipment Gross Less accumulated depreciation Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Property and equipment, net Accrued research and development, current. Payroll related Employee Related Liabilities Current Professional fees Accrued Professional Fees Current Research and development Accrued Research And Development Current Other Other Accrued Liabilities Current Total accrued expenses Number of votes entitled to each share of common stock. Stockholders Equity Note [Abstract] Number of votes entitled to each share of common stock Number Of Votes Entitled To Each Share Of Common Stock Cash dividends Dividends Common Stock Cash Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Long Term Incentive Plan 2015. Plan 2015 Long Term Incentive Plan2015 [Member] Award Type Award Type [Axis] Equity Award Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Restricted Common Stock Restricted Stock [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Increase in number of shares available for issuance (in shares) Share Based Compensation Arrangement By Share Based Payment Award Number Of Additional Shares Authorized Shares available for future grants Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Share-based Compensation Arrangement by Share-based Payment Award, Options Outstanding, Weighted Average Exercise Price, and Additional Disclosures [Abstract] Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Exercise Price And Additional Disclosures [Abstract] Outstanding Beginning balance, Number of options Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number Granted, Number of options Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross Exercised, Number of options Stock Issued During Period Shares Stock Options Exercised Forfeited, Number of options Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period Outstanding Ending balance, Number of options Number of options, Vested or expected to vest Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number Number of options, Exercisable Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number Beginning balance, Weighted-average price Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Granted, Weighted-average price Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price Exercised, Weighted-average price Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price Forfeited, Weighted-average price Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price Ending balance, Weighted-average price Weighted-average price Vested or 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 price, Exercisable Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price Outstanding, weighted average remaining contractual term (Year) Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 Weighted average remaining contractual term, Vested or 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 Beginning balance, Aggregate Intrinsic value Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value Ending balance, Aggregate Intrinsic value Aggregate Intrinsic value, Vested or expected to vest at March 31, 2019 Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value Aggregate Intrinsic value, Exercisable at March 31, 2019 Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 Employee unrecognized compensation expense Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options Employee unrecognized compensation cost, period of recognition Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 Beginning balance, Number of unvested shares/units Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number Granted, Number of shares/units Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Vested, Number of shares/units Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Forfeited, Number of shares/units Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period Ending balance, Number of unvested shares/units Beginning balance, Unvested Grant date fair value Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value Granted, Grant date fair value Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value Vested, Grant date fair value Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value Forfeited, Grant date fair value Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value Ending balance, Unvested Grant date fair value 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] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Research and Development Expense Research And Development Expense [Member] General and Administrative Expense General And Administrative Expense [Member] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Equity-based compensation expense Allocated Share Based Compensation Expense Stock Options Employee Stock Option [Member] Restricted Stock Awards Upfront payments. Potential Milestone Payment Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] Type of Arrangement and Non-arrangement Transactions Type Of Arrangement [Axis] Arrangements and Non-arrangement Transactions Arrangements And Nonarrangement Transactions [Member] Abb Vie agreement. AbbVie Agreement Abb Vie Agreement [Member] Business Acquisition Business Acquisition [Axis] Business Acquisition, Acquiree Business Acquisition Acquiree [Domain] IBDCo [Member] IBDCo Ibdco [Member] Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] Upfront non refundable payment Upfront Payments Potential milestone payment Potential Milestone Payment Anticipated completion period for research and development projects. Collaboration in research and development Anticipated Completion Of Research And Development Projects Period Milestone Payments Milestone payment Milestone Payments Number of mile stone payments under second phase. Initial milestone payment upon execution of amendment. Number of mile stone payments under second phase Number Of Mile Stone Payments Under Second Phase Initial milestone payment upon execution of amendment Initial Milestone Payment Upon Execution Of Amendment Increase in transaction price of performance obligation of second phase. Increase in transaction price of performance obligation of second phase Increase In Transaction Price Of Performance Obligation Of Second Phase Milestone payment on achievement of remaining milestone. Remaining milestone achieved Mile Stone Payment On Achievement Of Remaining Mile Stone Recognition of revenue Long term deferred revenue Current deferred revenue Antidilutive Securities Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis] Antidilutive Securities, Name Antidilutive Securities Name [Domain] Unvested Restricted Stock Awards [Member] Unvested Restricted Common Stock Awards Unvested Restricted Stock Awards [Member] Potentially Common Shares Excluded from Calculation of Net Loss Per share Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Rentable Space Under Lease Agreement Operating leases rent expense annual rental payments. The amount the lessee agrees to invest into a tenant improvement of a leased property. Commitments and contingencies. Commitments and contingencies. Commitments And Contingencies [Table] Commitments And Contingencies [Table] Master contract services agreement. Master Services Agreement Master Contract Services Agreement [Member] Range Range [Axis] Range Range [Member] Maximum Maximum [Member] Minimum [Member] Minimum [Member] Legal Entity Legal Entity [Axis] Entity Entity [Domain] Azzur Group Limited Liability Company. Azzur Group, LLC Azzur Group Limited Liability Company [Member] Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Laboratory and office space to be leased Rentable Space Under Lease Agreement Operating lease annual rent Operating Leases Rent Expense Annual Rental Payments Term of lease Lessee Operating Lease Term Of Contract Tenant improvement investment Tenant Improvement Investment Obligation Letter of credit Line Of Credit Facility Maximum Borrowing Capacity Renewal term of lease Lessee Operating Lease Renewal Term Lessee, operating lease, existence of option to terminate Lessee Operating Lease Existence Of Option To Terminate Access and Use of space under agreement. Term of agreement. Estimated project costs. Agreement expiration date. Access and use of space under agreement Access And Use Of Space Under Agreement Term of agreement Term Of Agreement Agreement expiration date Agreement Expiration Date Estimated project costs Estimated Project Costs Term of prior terminate written notice. Term of prior terminate written notice Term Of Prior Terminate Written Notice Cash paid included in operating cash flows Operating Lease Payments Operating and variable lease cost. Finance Lease cost. Operating lease cost. Operating leases Operating Lease Cost [Abstract] Operating lease cost Operating Lease Cost Variable lease cost Variable Lease Cost Operating and variable lease cost Operating And Variable Lease Cost Short-term lease cost Short Term Lease Cost Finance leases Finance Lease Cost [Abstract] Depreciation on finance leases Finance Lease Right Of Use Asset Amortization Interest on finance leases Finance Lease Interest Expense Finance lease cost Finance Lease Cost Total lease cost Lease Cost Total right-of-use asset for finance leases Finance Lease Right Of Use Asset Operating Lease, Weighted average discount rate Operating Lease Weighted Average Discount Rate Percent Operating Lease, Weighted average remaining lease term (years) Operating Lease Weighted Average Remaining Lease Term1 Finance Leases, Weighted average discount rate Finance Lease Weighted Average Discount Rate Percent Finance Leases, Weighted average remaining lease term (years) Finance Lease Weighted Average Remaining Lease Term1 Operating Lease Operating Lease Liabilities Payments Due [Abstract] 2019 Lessee Operating Lease Liability Payments Remainder Of Fiscal Year 2020 Lessee Operating Lease Liability Payments Due Year Two 2021 Lessee Operating Lease Liability Payments Due Year Three 2022 Lessee Operating Lease Liability Payments Due Year Four 2023 Lessee Operating Lease Liability Payments Due Year Five Thereafter Lessee Operating Lease Liability Payments Due After Year Five Total lease payments Lessee Operating Lease Liability Payments Due Less: imputed interest Lessee Operating Lease Liability Undiscounted Excess Amount Total lease liabilities Current lease liabilities Long-term lease liabilities Finance Leases Finance Lease Liabilities Payments Due [Abstract] 2019 Finance Lease Liability Payments Remainder Of Fiscal Year 2020 Finance Lease Liability Payments Due Year Two 2021 Finance Lease Liability Payments Due Year Three 2022 Finance Lease Liability Payments Due Year Four 2023 Finance Lease Liability Payments Due Year Five Thereafter Finance Lease Liability Payments Due After Year Five Total lease payments Finance Lease Liability Payments Due Less: imputed interest Finance Lease Liability Undiscounted Excess Amount Total lease liabilities Finance Lease Liability Current lease liabilities Long-term lease liabilities Operating lease Operating Leases Future Minimum Payments Due [Abstract] 2019 Operating Leases Future Minimum Payments Due Current 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 2023 Operating Leases Future Minimum Payments Due In Five Years Thereafter Operating Leases Future Minimum Payments Due Thereafter Total future minimum lease payments Operating Leases Future Minimum Payments Due Capital leases Capital Leases Future Minimum Payments Net Present Value [Abstract] 2019 Capital Leases Future Minimum Payments Due Current 2020 Capital Leases Future Minimum Payments Due In Two Years 2021 Capital Leases Future Minimum Payments Due In Three Years 2022 Capital Leases Future Minimum Payments Due In Four Years 2023 Capital Leases Future Minimum Payments Due In Five Years Thereafter Capital Leases Future Minimum Payments Due Thereafter Total future minimum lease payments Capital Leases Future Minimum Payments Due Less amounts representing interest Capital Leases Future Minimum Payments Interest Included In Payments Capital lease obligations at December 31, 2018 Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments Less current portion of capital lease obligations Capital Lease Obligations Current Capital lease obligations, net of current portion Capital Lease Obligations Noncurrent