Debt Disclosure [Abstract] Notes Payable Debt Disclosure [Text Block] Income Statement [Abstract] Unrealized income (loss) on available for sale securities, tax Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax Balance Sheet Related Disclosures [Abstract] Property and Equipment Property, Plant and Equipment [Table Text Block] Schedule of Accrued Expenses Schedule of Accrued Liabilities [Table Text Block] Equity [Abstract] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Revenue Recognition [Abstract] Deferred Revenue Arrangement, by Type [Table] Deferred Revenue Arrangement, by Type [Table] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] TESARO TESARO, Inc. And TESARO Development, Inc. [Member] TESARO, Inc. And TESARO Development, Inc. [Member] Celgene Corporation Celgene Corporation [Member] Celgene Corporation [Member] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Collaborative Research And Development Agreement Collaborative Arrangement [Member] Initiated in vivo toxicology studies using good laboratory practices (GLPs) In Vivo Toxicology Studies [Member] In Vivo Toxicology Studies [Member] IND clearance from the FDA Clearance Of Investigational New Drug From FDA [Member] Clearance Of Investigational New Drug From FDA [Member] Phase 2 clinical trial initiation Phase 2 Clinical Trial Initiation [Member] Phase 2 Clinical Trial Initiation [Member] Phase 3 clinical trial initiation Phase 3 Clinical Trial Initiation [Member] Phase 3 Clinical Trial Initiation [Member] Phase 3 clinical trial initiation - second indication [Domain] Phase 3 clinical trial initiation - second indication [Domain] Phase 3 clinical trial initiation - second indication [Domain] Filing of the first NDA - first indication Filing of NDA [Member] Filing of NDA [Member] Filing of the first MAA - first indication Filing of MMA [Member] Filing of MMA [Member] Phase 1 clinical trial initiation Phase 1 Clinical Trial Initiation [Member] Phase 1 Clinical Trial Initiation [Member] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Anti-PD-1 (TSR042/Dostarlimab) AnaptysBio-generated Anti-PD-1 Antagonist Antibody (TSR-042) [Member] AnaptysBio-generated Anti-PD-1 Antagonist Antibody (TSR-042) [Member] Anti-TIM-3 (TSR022/Cobolimab) AnaptysBio Generated Anti-TIM3 Antagonist Antibody (TSR-022) [Member] AnaptysBio Generated Anti-TIM3 Antagonist Antibody (TSR-022) [Member] Anti-LAG-3 (TSR033/Encelimab) AnaptysBio Generated Anti-LAG3 Antagonist Antibody (TSR-033) [Member] AnaptysBio Generated Anti-LAG3 Antagonist Antibody (TSR-033) [Member] Anti-PD-1 (CC-90006) AnaptysBio-Generated Anti-PD-1 Antagonist Antibody (CC-90006) [Member] AnaptysBio-Generated Anti-PD-1 Antagonist Antibody (CC-90006) [Member] Deferred Revenue Arrangement [Line Items] Deferred Revenue Arrangement [Line Items] Upfront license fee received Revenue Recognition, Multiple-deliverable Arrangements, Upfront Fee Received Revenue Recognition, Multiple-deliverable Arrangements, Upfront Fee Received Number of outstanding research and development targets Revenue Recognition, Milestone Method, Number Of Outstanding Research And Development Targets Revenue Recognition, Milestone Method, Number Of Outstanding Research And Development Targets Milestone payments, contingent upon preclinical and clinical trial events (up to) Revenue Recognition, Milestone Method, Contingent Upon Preclinical And Clinical Trial Events Revenue Recognition, Milestone Method, Contingent Upon Preclinical And Clinical Trial Events Milestone payments, contingent upon certain U.S. and European regulatory submissions and approvals (up to) Revenue Recognition, Milestone Method, Contingent Upon Certain United States And European Regulatory Submissions And Approvals Revenue Recognition, Milestone Method, Contingent Upon Certain United States And European Regulatory Submissions And Approvals Milestone payments, contingent upon achievement of specified levels of worldwide sales (up to) Revenue Recognition, Milestone Method, Contingent Upon Achievement Of Specified Levels Of Worldwide Sales Revenue Recognition, Milestone Method, Contingent Upon Achievement Of Specified Levels Of Worldwide Sales Agreement term following first commercial sale or expiration of the last to expire patent (in years) Revenue Recognition, Milestone Method, Agreement Term Following First Commercial Sale Or Expiration Of The Last To Expire Patent Revenue Recognition, Milestone Method, Agreement Term Following First Commercial Sale Or Expiration Of The Last To Expire Patent Number of milestones achieved during period Revenue Recognition, Milestone Method, Number Of Milestones Achieved During Period Revenue Recognition, Milestone Method, Number Of Milestones Achieved During Period Milestones achieved, amount Revenue Recognition, Milestone Method, Milestones Achieved During The Period, Amount Revenue Recognition, Milestone Method, Milestones Achieved During The Period, Amount Collaboration revenue Revenue from Contract with Customer, Excluding Assessed Tax Maximum milestone payments per target Revenue Recognition, Milestone Method, Maximum Revenue Per Milestone Revenue Recognition, Milestone Method, Maximum Revenue Per Milestone Milestone Event Revenue Recognized, Milestone Method, Milestone Payment Earned Revenue Recognized, Milestone Method, Milestone Payment Earned Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2017 Equity Incentive Plan Equity Incentive Plan, 2017 [Member] Equity Incentive Plan, 2017 [Member] 2017 Employee Stock Purchase Plan Employee Stock Purchase Plan, 2017 [Member] Employee Stock Purchase Plan, 2017 [Member] Class of Stock [Line Items] Class of Stock [Line Items] Issued and Outstanding: Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] Stock options issued and outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Shares reserved for future award grants (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Common stock, shares reserved for issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent event Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Area of leased property (sqft) Area of Real Estate Property Lease term Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract Lease renewal term Lessee, Operating Lease, Lease Not yet Commenced, Renewal Term Lease termination term Lessee, Operating Lease, Lease Not yet Commenced, Expiration Period Lessee, Operating Lease, Lease Not yet Commenced, Expiration Period Monthly base rate (usd per sqft) Rent Per Square Foot Rent Per Square Foot Increase in annual rent Annual Rent Increase, Percent Annual Rent Increase, Percent Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Laboratory equipment Laboratory Equipment [Member] Laboratory Equipment [Member] Office furniture and equipment Office Equipment [Member] Leasehold improvements Leasehold Improvements [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 and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Total property and equipment, net Property, Plant and Equipment, Net Fair Value Disclosures [Abstract] Schedule of Assets and Liabilities that Require Fair Value Measurements on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Fair Value of Other Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Available-for-sale Investments Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Schedule of Unrealized Loss and Fair Values in a Loss Position Schedule of Unrealized Loss on 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Development Expenses, Current Other Other Accrued Liabilities, Current Total accrued expenses Accrued Liabilities, Current Share-based Payment Arrangement [Abstract] Summary of Activity Related to Stock Option Awards Share-based Payment Arrangement, Option, Activity [Table Text Block] Summary of Weighted Average Assumptions in Stock Option Valuations Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Summary of Non-cash Stock-based Compensation Expense Share-based Payment Arrangement, Cost by Plan [Table Text Block] Shares Subject to Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Stock options outstanding, beginning balance (in shares) Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Exercises (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Forfeitures and cancellations (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Stock options outstanding, ending balance (in shares) Stock options exercisable, ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted-Average Exercise Price per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Stock options outstanding, beginning balance (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 Exercises (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Forfeitures and cancellations (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Stock options outstanding, ending balance (in dollars per share) Stock options exercisable, ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted-Average Remaining Contractual Term and Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Weighted average remaining contractual term, options outstanding (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted average remaining contractual term, options exercisable (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate intrinsic value, options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate intrinsic value, options exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Equity Incentive Plans Share-based Payment Arrangement [Text Block] Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Receivable from collaborative partners Receivables, Net, Current Short-term investments Debt Securities, Available-for-sale, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net Long-term investments Debt Securities, Available-for-sale, Noncurrent Other long-term assets Other Assets, Noncurrent Restricted cash Restricted Cash and Cash Equivalents, Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued expenses Notes payable, current portion Notes Payable, Current Other current liabilities Other Liabilities, Current Total current liabilities Liabilities, Current Other long-term liabilities Other Liabilities, Noncurrent Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.001 par value, 10,000 shares authorized and no shares, issued or outstanding at March 31, 2020 and December 31, 2019, respectively Preferred Stock, Value, Issued Common stock, $0.001 par value, 500,000 shares authorized, 27,277 shares and 27,255 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively Common Stock, Value, Issued Additional paid in capital Additional Paid in Capital Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated deficit Retained Earnings (Accumulated Deficit) Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders’ equity Liabilities and Equity Schedule of Outstanding Potentially Dilutive Securities Excluded in the Calculation of Diluted Net Loss Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Classification on the Balance Sheet Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee [Table Text Block] Costs Included in Cash Flow Statement Lease, Cost [Table Text Block] Schedule of Future Minimum Annual Obligations Lessee, Operating Lease, Liability, Maturity [Table Text Block] Collaborative Research and Development Agreements Collaborative Arrangement Disclosure [Text Block] Schedule of Operating Leased Assets [Table] Schedule of Operating Leased Assets [Table] Lease Arrangement [Axis] Lease Arrangement [Axis] Lease Arrangement [Axis] Lease Arrangement [Domain] Lease Arrangement [Domain] [Domain] for Lease Arrangement [Axis] One office lease One Office Lease [Member] One Office Lease [Member] Operating Leased Assets [Line Items] Operating Leased Assets [Line Items] Non-cancellable office leases Lessee, Operating Lease, Number Lessee, Operating Lease, Number Operating lease, term of contract Lessee, Operating Lease, Term of Contract Number of one year renewal options Lessee, Operating Lease, One Year Renewal Options, Number Lessee, Operating Lease, One Year Renewal Options, Number Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Schedule of Common Stock Reserved for Future Issuance Schedule Of Common Stock Reserved For Future Issuance [Table Text Block] Schedule Of Common Stock Reserved For Future Issuance [Table Text Block] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-sale [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Agency securities US Government Agencies Debt Securities [Member] Certificates of deposit Certificates of Deposit [Member] Commercial and corporate obligations Commercial And Corporate Obligations [Member] Commercial And Corporate Obligations [Member] U.S. Treasury securities US Treasury Securities [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Total Fair Value Debt Securities, Available-for-sale Investments outstanding, maturity date range (in years) Available-for-sale Debt Securities, Remaining Maturity Available-for-sale Debt Securities, Remaining Maturity Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Employee stock Employee Stock [Member] Options to purchase common stock Share-based Payment Arrangement, Option [Member] Employee and nonemployee stock options Employee And Nonemployee Stock Options [Member] Employee And Nonemployee Stock Options [Member] Title of Individual [Axis] Title of Individual [Axis] Title of Individual [Domain] Title of Individual [Domain] Director Stock options Director [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Annual increase in number of shares available for issuance Common Stock, Capital Shares Reserved For Future Issuance, Annual Increase, Percent Of Aggregate Shares Outstanding Common Stock, Capital Shares Reserved For Future Issuance, Annual Increase, Percent Of Aggregate Shares Outstanding Capital shares reserved for future issuance, increase (in shares) Common Stock, Capital Shares Reserved For Future Issuance, Increase Common Stock, Capital Shares Reserved For Future Issuance, Increase Award vesting period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Award expiration period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Unrecognized compensation cost Employee And Nonemployee Service Share-based Compensation, Nonvested Awards, Compensation Not Yet Recognized, Stock Options Employee And Nonemployee Service Share-based Compensation, Nonvested Awards, Compensation Not Yet Recognized, Stock Options Weighted average period remaining for amortization of unrecognized compensation cost (in years) Employee And Nonemployee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not Yet Recognized, Period For Recognition Employee And Nonemployee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not Yet Recognized, Period For Recognition Collaboration revenue 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), net: Nonoperating Income (Expense) [Abstract] Interest expense Interest Expense Interest income Interest Income (Expense), Nonoperating, Net Other income, net Other Nonoperating Income (Expense) Total other income (expense), net Nonoperating Income (Expense) Loss before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) Net loss Net Income (Loss) Attributable to Parent Unrealized income on available for sale securities, net of tax of $0 and $115, respectively Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Net loss per common share: Earnings Per Share, Basic and Diluted [Abstract] Basic and diluted (in dollars per share) Earnings Per Share, Basic and Diluted Weighted-average number of shares outstanding: Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Basic and diluted (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Weighted average grant date fair value per share (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Number of reportable segments Number of Reportable Segments Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] 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Instrument, Interest Rate, Stated Percentage Final payment fee Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Research and development Research and Development Expense [Member] General and administrative General and Administrative Expense [Member] Stock-based compensation Share-based Compensation And Issuance Of Stock And Warrants For Services Or Claims Share-based Compensation And Issuance Of Stock And Warrants For Services Or Claims Operating ROU assets, Other long-term assets Operating Lease, Right-of-Use Asset Operating lease liabilities, Other current liabilities Operating Lease, Liability, Current Operating lease liabilities, Other long-term liabilities Operating Lease, Liability, Noncurrent Subsequent Events Subsequent Events [Text Block] Statement of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Net 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 Accretion/amortization of investments, net Unrealized Gain (Loss) on Investments Non-cash interest expense Other Noncash Income (Expense) Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Receivable from collaborative partners Increase (Decrease) in Contract with Customer, Asset Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities 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] Acquisition of investments Payments to Acquire Debt Securities, Available-for-sale Sales and maturities of investments Proceeds from Sale and Maturity of Debt Securities, Available-for-sale Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Net cash provided by 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 issuance of common stock, upon the exercise of stock options Proceeds from Stock Options Exercised Payments on notes payable Repayments of Notes Payable Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Net decrease in cash, cash equivalents, and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Cash, cash equivalents and restricted cash, beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash, end of period SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Amounts accrued for property and equipment Capital Expenditures Incurred but Not yet Paid Balance Sheet Accounts and Supplemental Disclosures Supplemental Balance Sheet Disclosures [Text Block] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Accumulated Other Comprehensive (Loss) Income AOCI Attributable to Parent [Member] Accumulated Deficit Retained Earnings [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Stockholders' Equity, Beginning Balance Stockholders' Equity, Beginning Balance (in shares) Shares, Outstanding Shares issued under employee stock plans Stock Issued During Period, Value, Stock Options Exercised Shares issued under employee stock plans (in shares) Stock-based compensation APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition Comprehensive income (loss), net Other Comprehensive Income (Loss), Net of Tax Stockholders' Equity, Ending Balance Stockholders' Equity, Ending Balance (in shares) 2020 Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year 2021 Lessee, Operating Lease, Liability, Payments, Due Year Two 2022 Lessee, Operating Lease, Liability, Payments, Due Year Three 2023 Lessee, Operating Lease, Liability, Payments, Due Year Four 2024 Lessee, Operating Lease, Liability, Payments, Due Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total minimum payments required Lessee, Operating Lease, Liability, Payments, Due Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Total Operating Lease, Liability Organization, Consolidation and Presentation of Financial Statements [Abstract] Description of the Business Nature of Operations [Text Block] 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 [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive 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Equivalents [Domain] Cash and Cash Equivalents [Domain] Money market funds Money Market Funds [Member] Mutual funds Mutual Fund [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Investments at fair value Cash And Cash Equivalents And Restricted Cash, Fair Value Disclosure Cash And Cash Equivalents And Restricted Cash, Fair Value Disclosure Available-for-sale securities, debt securities Cover [Abstract] Document Type Document Type Document Quarterly Report Document Quarterly Report Document Period End Date Document Period End Date Document Transition Report Document Transition Report Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category 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 Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Carrying Amount Reported Value Measurement [Member] Fair Value Estimate of Fair Value Measurement [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Notes payable Notes Payable, Fair Value Disclosure Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Schedule of Collaborative Arrangements and Non-collaborative Arrangement Transactions Collaborative Arrangement and Arrangement Other than Collaborative [Table Text Block] Less than 12 Months, Fair Value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Less than 12 Months, Gross Unrealized Losses Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 12 Months or Greater, Fair Value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 12 Months or Greater, Gross Unrealized Losses Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Fair Value Debt Securities, Available-for-sale, Unrealized Loss Position Gross Unrealized Losses Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss