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Non Refundable Cash Payments [Member] Non-Refundable Cash Payments [Member] Common stock, new shares issued Common stock shares purchased Stock Issued During Period, Shares, New Issues Earnings Per Share, Diluted, Total Net loss per share attributable to common stockholders— diluted Earnings Per Share, Diluted Diluted loss per share attributable to common stockholders Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Operating Financial Results Title of Individual Title and Position [Domain] City Area Code City Area Code Collaboration revenue Collaboration Revenue Collaboration Revenue Counterparty Name Counterparty Name [Domain] Inventory, Finished Goods and Work in Process, Gross [Abstract] Segment Reporting Information [Line Items] Stock Issued During Period, Shares, Restricted Stock Award, Gross Vesting of RSUs Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Property, Plant and Equipment, Net, Total Property and equipment, net Property, Plant and Equipment, Net Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total CASH, CASH EQUIVALENTS AND RESTRICTED CASH—beginning of period CASH, CASH EQUIVALENTS AND RESTRICTED CASH —end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Loss from operations Operating Income (Loss) Debt, Current Total royalty interest financing liability, net Accumulated Deficit [Member] Retained Earnings [Member] Share-Based Payment Arrangement, Noncash Expense, Total Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Total long-term liabilities Liabilities, Noncurrent Quoted Prices (Unadjusted) in Active Markets Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Class Of Stock [Line Items] Class of Stock [Line Items] Class of Stock [Line Items] Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Incyte Agreement [Member] Collaboration And License Agreement [Member] Collaboration and license agreement. Other income (expense), net: Nonoperating Income (Expense) [Abstract] Commercialization milestones and tiered royalties Commercialization Milestones And Tiered Royalties Commercialization milestones and tiered royalties. AOCI, Debt Securities, Available-for-Sale, Adjustment, after Tax Accumulated other comprehensive gain Ex-U.S. Countries [Member] Non-US [Member] Potential Dilutive Securities Excluded from Computation of Diluted Net Loss per Common Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Corporate Bonds [Member] Corporate Debt Securities [Member] Debt Securities Available For Sale [Table] Debt Securities, Available-for-Sale [Table] Entity Interactive Data Current Entity Interactive Data Current Significant Collaborative Research and License Agreements Collaborative Research And License Agreements [Text Block] Collaborative research and license agreements. Schedule Of Research And Development Arrangement Contract To Perform For Others [Table] Research and Development, Contract to Perform for Others [Table] Income Statement Location Statement of Income Location, Balance [Domain] Fair Value Measurement [Domain] CASH FLOWS FROM OPERATING ACTIVITIES: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Furniture and Fixtures [Member] Accretion of investments Accretion (Amortization) of Discounts and Premiums, Investments Available For Sale Securities Fair Value Disclosure [Abstract] Available For Sale Securities Fair Value Disclosure [Abstract] Entity Tax Identification Number Entity Tax Identification Number Revenue: Revenues [Abstract] Collaboration Receivable, Net Collaboration receivable, net Collaboration receivable, net Local Phone Number Local Phone Number Denominator—basic and diluted: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Accounting Policies [Abstract] Total revenues Revenue from Contract with Customer, Excluding Assessed Tax Total Revenue Total revenues Numerator—basic and diluted: Net Income (Loss) Attributable to Parent [Abstract] Schedule Of Earnings Per Share Basic By Common Class [Table] Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Common stock reserved for issuance Weighted average period to recognize compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Accrued professional fees Accrued Professional Fees, Current Schedule of Accrued Expenses and Other Current Liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Schedule Of Stock By Class [Table] Stock, Class of Stock [Table] Entity Emerging Growth Company Entity Emerging Growth Company