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Document Period End Date Document Period End Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Adoption Date Trading Arrangement Adoption Date Less: Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Entity Central Index Key Entity Central Index Key Class of Warrant or Right Class of Warrant or Right [Axis] Total stock-based compensation Share-Based Payment Arrangement, Expense Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Provision for income taxes Current income tax (benefits) expense or provision Income Tax Expense (Benefit) Reconciliation of cash, cash equivalents and restricted cash: Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract] Accrued compensation Employee-related Liabilities, Current Pfizer Agreement Pfizer [Member] Pfizer Vesting of early exercised stock options Adjustments To Additional Paid In Capital Share Based Compensation Vesting Of Early Exercised Stock Options Adjustments to additional paid in capital share based compensation vesting of early exercised stock options. Name Trading Arrangement, Individual Name Warrant price (in USD per share) Warrant Price Warrant price. Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Amendment Flag Amendment Flag Money market funds Money Market Funds [Member] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Shares issued (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Additional payment received to exercise option to expand number of targets Additional Payment Received To Exercise Option To Expand Number Of Targets Additional payment received to exercise option to expand number of targets. Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Leasehold improvements Leasehold Improvements [Member] Weighted-average number of shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Operating expenses: Operating Expenses [Abstract] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Company Selected Measure Amount Company Selected Measure Amount Additional paid-in capital Additional Paid in Capital, Common Stock Additional paid-in capital Additional Paid-in Capital [Member] Weighted-average price per share (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Per Share Weighted Average Price of Shares Purchased Vesting of restricted stock units (in shares) Restricted Stock, Shares Issued Net of Shares for Tax Withholdings Balance Sheet Location Balance Sheet Location [Axis] Cash, cash equivalents and restricted cash at beginning of period Cash, cash equivalents and restricted cash at end of period Total cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Total assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Cover [Abstract] Cover [Abstract] Net proceeds from warrants Proceeds from Issuance of Warrants Subsequent Events Subsequent Events [Text Block] Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Fair Value Measurements, Recurring Fair Value, Recurring [Member] Defined Contribution Plan Defined Contribution Plan [Text Block] Fair Value Measurements Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block] Weighted-average grant date fair value, RSUs vested (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Non-NEOs Non-NEOs [Member] Warrants offering expenses Warrants Offering Expenses Warrants offering expenses. Unrealized loss, long-term Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax, Noncurrent Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax, Noncurrent Total operating expenses Operating Expenses 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 flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Non-PEO NEO Non-PEO NEO [Member] Renewal term Lessee, Operating Lease, Renewal Term Equity Component Equity Component [Domain] Adjustment to Compensation: Adjustment to Compensation [Axis] Included in marketable securities, non-current Other Long-Term Investments [Member] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Contract assets Contract with Customer, Asset, after Allowance for Credit Loss Scenario Scenario [Axis] Weighted-average number of shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status Loss from operations Operating Income (Loss) Maximum increase or decrease percentage of warrants Maximum Increase Or Decrease Percentage Of Warrants Maximum increase or decrease percentage of warrants. At the Market Offering At The Market Offerings [Member] At the market offerings. Included in cash and cash equivalents Cash and Cash Equivalents [Member] Statement of Other Comprehensive Income [Abstract] Statement of Other Comprehensive Income [Abstract] Related Party Transaction [Axis] Related Party Transaction [Axis] Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Statement [Line Items] Statement [Line Items] Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Scenario Scenario [Domain] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Chief Financial Officer Chief Financial Officer [Member]