Scenario [Domain] Scenario [Axis] Fair value of options granted Share Based Compensation Arrangement By Share based Payment Award Options Grants In Period Fair Value Granted, shares Total accrued Liabilities Schedule of Accrued Liabilities Accrued Liabilities Accounts payable and accrued liabilities Unbilled grant receivable Net cash used in investing activities Net increase in cash and cash equivalents Other comprehensive income (loss) Convertible Notes Severance benefits recognized Temporary equity, conversion of convertible preferred stock Temporary equity, conversion of convertible preferred stock, shares Unrealized (loss) gain on available-for-sale securities Licensed Products Licensed Products. Net sales Revenues, Total Shares Issuable Upon the Exercise of Outstanding Common Stock Options Shares issuable upon the exercise of outstanding common stock options. Shares issued Subsequent Events Date of separation agreement Date of separation agreement. Separation Agreement Separation Agreement [Member] Severance Costs Number of shares vested Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares Subsequent Event [Line Items] Subsequent Event [Table] Subsequent Events [Abstract] Change in convertible preferred stock warrant liability Fair Value Adjustment of Warrants Common stock, $0.00012 par value; 900,000,0002 shares authorized at September 30, 2021 and December 31, 2020, respectively; 37,351,1042 and 32,485,7842 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively Initial public offering, issuance cost Adjustments To Additional Paid In Capital Stock Of Initial Public Offering Costs Adjustments to additional paid in capital stock of initial public offering costs. Conversion of convertible preferred stock Temporary equity, conversion of convertible preferred stock, shares Temporary equity, conversion of convertible preferred stock Conversion of convertible preferred stock, shares Stock Issued During Period Shares Conversion Of Convertible Preferred Stock Stock issued during period shares conversion of convertible preferred stock. Temporary Equity Stock Issued During Period Value Conversion Of Convertible Preferred Stock Temporary equity stock issued during period value conversion of convertible preferred stock. Temporary Equity Stock Issued During Period Shares Conversion Of Convertible Preferred Stock Temporary equity stock issued during period shares conversion of convertible preferred stock. Stock Issued During Period Value Conversion Of Convertible Preferred Stock Stock issued during period value conversion of convertible preferred stock. Proceeds from initial public offering, net of underwriters' discounts and commissions and issuance costs Proceeds from initial public offering, net of underwriters' discounts and commissions and issuance costs, Shares Proceeds from follow-on public offering, net of underwriters' discounts and commissions and issuance costs, Shares Proceeds from follow-on public offering, net of underwriters' discounts and commissions and issuance costs Issuance of Common Stock Shares During Period Follow-on Public Offering Net of Underwriters Discounts and Commissions Issuance of common stock shares during period follow-on public offering, net of underwriters' discounts and commissions. Issuance of Common Stock Value During Period Follow-on Public Offering Net of Underwriters Discounts and Commissions Issuance of common stock value during period follow-on public offering, net of underwriters' discounts and commissions. Proceeds from follow-on public offering, net of issuance costs Proceeds From Follow On Public Offering, Net of Issuance Costs Proceeds from follow-on public offering, net of issuance costs. Conversion of convertible preferred stock upon closing of initial public offering Purchases of property and equipment included in accounts payable and accrued liabilities Capital Expenditures Incurred but Not yet Paid Conversion of Stock, Amount Converted Proceeds from initial public offering, net of issuance costs Non-vested at September 30, 2021 Net lease liability Other Assets, Noncurrent, Total Cash and Cash Equivalents, at Carrying Value, Ending Balance Cash and Cash Equivalents, at Carrying Value, Beginning Balance Other Nonoperating Income (Expense), Total Short-term Investments, Total Long-term Investments, Total Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Period Increase (Decrease), Total Forecast Research and Development Expense, Total Property, Plant and Equipment, Gross, Ending Balance Property, Plant and Equipment, Gross, Beginning Balance Property, Plant and Equipment, Gross, Total Operating Lease, Liability, Total Proceeds from Sale of Available-for-sale Securities, Total Increase (Decrease) in Accounts Payable and Accrued Liabilities, Total Interest and Other Income, Total Share-based Payment Arrangement, Noncash Expense, Total Interest Expense, Total Depreciation, Total APIC, Share-based Payment Arrangement, Increase for Cost Recognition, Total Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Total Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total Debt Securities, Available-for-sale, Current, Total Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent, Total Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Total Payments to Acquire Property, Plant, and Equipment, Total Increase (Decrease) in Prepaid Expense and Other Assets, Total Operating Income (Loss), Total Other Comprehensive Income (Loss), Net of Tax, Total Outstanding shares of potentially dilutive securities were excluded from the computation of the diluted net loss per share Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Convertible Preferred Stock Warrants Convertible Preferred Stock Warrants [Member] Convertible preferred stock warrants member. Common Stock Warrants Common Stock Warrants [Member] Common stock warrants member. Employee Stock Purchase Plan Employee Stock Purchase Plan [Member] Stock Options to Purchase Common Stock Stock Options To Purchase Common Stock [Member] Stock options to purchase common stock. Non-vested RSUs Non Vested Restricted Stock Units [Member] Non-vested restricted stock units member. Non-vested RSAs Non Vested Restricted Stock Awards [Member] Non-vested restricted stock awards member. Convertible Preferred Stock on An as-converted Basis Convertible Preferred Stock On Converted Basis [Member] Convertible preferred stock on an as-converted basis. Antidilutive Securities, Name Antidilutive Securities Name [Domain] Antidilutive Securities Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Weighted-Average Grant Date Fair Value, Non-vested, Vested Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value Weighted-Average Grant Date Fair Value, Non-vested, Granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value Weighted-Average Grant Date Fair Value, Non-vested, Beginning Balance Weighted-Average Grant Date Fair Value, Non-vested, Ending Balance Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value Non-vested at December 31, 2020 Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number Restricted Stock Units (RSUs) Restricted Stock Units R S U [Member] Vested Share vested Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Share granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Vesting period Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 Number of shares subject to repurchase upon discontinued service Share Based Compensation Arrangement By Share Based Payment Award Subject To Repurchase Upon Discontinued Service Share-based compensation arrangement by share-based payment award, subject to repurchase upon discontinued service. Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items] Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items] Exercise Price $20.55 to 29.41 Exercise Price Four [Member] Exercise price four. Exercise Price $17.00 to 19.94 Exercise Price Three [Member] Exercise price three. Exercise Price $1.04 to 1.49 Exercise Price Two [Member] Exercise price two. Exercise Price $0.16 to 1.00 Exercise Price One [Member] Exercise price one. Exercise Price Range Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Domain] Exercise Price Range Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range [Axis] Schedule Of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range [Table] Schedule Of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range [Table] Exercise Price ($) Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Share based compensation shares authorized under stock option plans exercise price. Remaining weighted-average period expected to recognize unrecognized compensation cost Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 Unrecognized compensation cost Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options Aggregate intrinsic value of options exercised Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value Fair value of options vested Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 Aggregate Intrinsic Value, Options exercisable Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 Aggregate Intrinsic Value, 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, Beginning Balance Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value Weighted-Average Remaining Contractual Term, Options exercisable (in years) Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 Weighted-Average Remaining Contractual Term, Expected to vest (in years) Gain (Loss) on Extinguishment of Debt, Total Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Total Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 Weighted-Average Remaining Contractual Term (in years) Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 Weighted-Average Exercise price per Share, Options exercisable Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price Weighted-Average Exercise price per Share, 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, Forfeited/expired Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price Weighted-Average Exercise price per Share, Exercised Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price Weighted-Average Exercise price per Share, Granted Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price Weighted-Average Exercise price per Share, Beginning Balance Weighted-Average Exercise price per Share, Ending Balance Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Shares Exercisable Shares, Options exercisable Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number Shares, Expected to vest Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number Shares, Granted Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross Stock-based compensation expense Allocated Share Based Compensation Expense Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] General and Administrative General And Administrative Expense [Member] Research and Development Research And Development Expense [Member] 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] 2020 Employee Stock Purchase Plan Tow Thousand And Twenty Employee Stock Purchase Plan [Member] Tow thousand and twenty employee stock purchase plan. 2020 Equity Incentive Plan Two Thousand And Twenty Equity Incentive Plan [Member] Two thousand and twenty equity incentive plan. Plan Name Plan Name [Domain] Plan Name Plan Name [Axis] Share based compensation percentage of number shares of common stock issued and outstanding on immediate proceeding Share Based Compensation Percentage Of Number Shares Of Common Stock Issued And Outstanding On Immediate Proceeding Share based compensation percentage of number shares of common stock issued and outstanding on immediate proceeding. Share based compensation maximum annual increase in number of shares that may be issued under the plan Share Based Compensation Maximum Annual Increase In Number Of Shares That May Be Issued Under Plan Share based compensation maximum annual increase in number of shares that may be issued under the plan. Reserved shares of common stock for future issuance Common Stock Capital Shares Reserved For Future Issuance Shares available for Future Grant under Employee Stock Purchase Plan Shares Available For Future Grant Under Employee Stock Purchase Plan [Member] Shares available for future grant under the employee stock purchase plan. Shares available for Future Grant under 2020 Equity Incentive Plan Shares Available For Future Grant Under Two Thousand Twenty Equity Incentive Plan [Member] Shares available for future grant under the 2020 equity incentive plan. Award Type Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Award Type Award Type [Axis] Convertible preferred stock shares issued upon conversion Convertible Preferred Stock Shares Issued Upon Conversion Convertible preferred stock terms of conversion Convertible Preferred Stock Terms Of Conversion Class of warrant or right, exercise price Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 Convertible preferred stock issuance for net proceeds Proceeds From Issuance Of Warrants Warrants to purchase preferred stock Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights Proceeds from issuance of convertible preferred stock Proceeds From Issuance Of Convertible Preferred Stock Purchase price per share Share Price Temporary Equity Shares Issued Class Of Stock [Line Items] Class Of Stock [Line Items] IPO I P O [Member] Purchase Price $1.15 Per Share Class Of Warrant Or Right Purchase Price One [Member] Class of warrant or right, purchase price one. Class of Warrant or Right Class Of Warrant Or Right [Domain] Class of Warrant or Right Class Of Warrant Or Right [Axis] Series B Convertible Preferred Stock Series B Convertible Preferred Stock [Member] Series B convertible preferred stock. Schedule Of Stock By Class [Table] Schedule Of Stock By Class [Table] Convertible preferred stock conversion price percentage Convertible Preferred Stock Conversion Price Percentage Convertible preferred stock conversion price percentage. Convertible preferred stock conversion price Convertible Preferred Stock Conversion Price Convertible preferred stock conversion price. Warrants to purchase preferred stock exercised Class Of Warrant Or Right Exercised Class of warrant or right exercised. Short term leases, rent expense Short Term Lease Cost Variable lease expense Variable Lease Cost Operating lease expense Operating Lease Expense Weighted average discount rate Operating Lease Weighted Average Discount Rate Percent Weighted average remaining lease term (years) Operating Lease Weighted Average Remaining Lease Term1 Present value adjustment for minimum lease commitments Lessee Operating Lease Liability Undiscounted Excess Amount Total undiscounted lease payments Lessee Operating Lease Liability Payments Due 2025 Lessee Operating Lease Liability Payments Due Year Four 2024 Lessee Operating Lease Liability Payments Due Year Three 2023 Lessee Operating Lease Liability Payments Due Year Two 2022 Lessee Operating Lease Liability Payments Due Next Twelve Months Remaining 2021 Lessee Operating Lease Liability Payments Remainder Of Fiscal Year Operating lease, additional term of contract Lessee Operating Lease Renewal Term Operating lease existence of option to extend Lessee Operating Lease Existence Of Option To Extend Operating lease initial term Lessee Operating Lease Term Of Contract Operating lease expiration month and year Operating Lease Expiration Month And Year Operating lease expiration month and year. Name of plaintiff Loss Contingency Name Of Plaintiff Lawsuit filing date Loss Contingency Lawsuit Filing Date University of Washington, Seattle University Of Washington Seattle [Member] University of Washington Seattle. Bothell, Washington Bothell Washington [Member] Bothell, Washington. Geographical Segment Geographical [Domain] Geographical Statement Geographical [Axis] Laboratory and Office Facilities Laboratory And Office Facilities [Member] Laboratory and office facilities. Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding, Beginning Balance Earnings Per Share, Basic and Diluted, Total Additional Paid in Capital, Common Stock, Ending Balance Additional Paid in Capital, Common Stock, Beginning Balance Accounts Payable, Current, Total Common Stock, Shares, Issued, Total Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance General and Administrative Expense, Total Employee-related Liabilities, Current, Total Slyne V. Athira Pharma Inc., Slyne V Athira Pharma Inc [Member] Slyne V. Athira Pharma Inc. Jawandha V. Athira Pharma Inc., Jawandha V Athira Pharma Inc [Member] Jawandha V. Athira Pharma Inc. Wang V. Athira Pharma Inc., Wang V Athira Pharma Inc [Member] Wang V. Athira Pharma, Inc. Litigation Case Litigation Case Type [Domain] Litigation Case Litigation Case [Axis] Commitment And Contingencies [Table] Commitment And Contingencies [Table] Commitment and contingencies. Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments and contingencies line items. Debt conversion, converted instrument, shares issued Debt Conversion Converted Instrument Shares Issued1 Debt instrument, accrued interest Interest Payable Current And Noncurrent Long-term investments maturity term. Short-term investments effective maturity date Short Term Investments Maturity Term Short-term investments maturity term. Investments, Fair Value Available For Sale Securities Debt Securities Noncurrent Investments, Fair Value Available For Sale Securities Debt Securities Current Investments, Unrealized Losses Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax Investments, Unrealized Gains Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax Investments, Amortized Cost Available For Sale Debt Securities Amortized Cost Basis Cash equivalents, Fair Value Cash And Cash Equivalents Fair Value Disclosure Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] U.S. Treasury Bills U S Treasury Securities [Member] Long Term Investments Long Term Investments [Member] Long-term Investments. Corporate Bonds Corporate Bond Securities [Member] U.S. Government Debt and Agency Securities U S Government Agencies Debt Securities [Member] Short-term Investments Short Term Investments [Member] Level 2 Fair Value Inputs Level2 [Member] Level 1 Fair Value Inputs Level1 [Member] Fair Value Hierarchy and NAV Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV Fair Value By Fair Value Hierarchy Level [Axis] Commercial Paper Commercial Paper [Member] Money Market Fund Money Market Funds [Member] Asset Class Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain] Asset Class Fair Value By Asset Class [Axis] Cash Equivalents Cash Equivalents [Member] Investments Investment Type Categorization [Member] Investment Type Investment Type [Axis] Recurring Basis Fair Value Measurements Recurring [Member] Measurement Frequency Fair Value Measurement Frequency [Domain] Measurement Frequency Fair Value By Measurement Frequency [Axis] Fair Value By Balance Sheet Grouping [Table] Fair Value By Balance Sheet Grouping [Table] Operating lease liabilities Operating Lease Liability Number of operating segments Number Of Operating Segments Debt instrument, interest rate Debt Instrument Interest Rate Stated Percentage Change in accounting principle, accounting standards update, adoption date Change In Accounting Principle Accounting Standards Update Adoption Date Change in accounting principle, accounting standards update, adopted Change In Accounting Principle Accounting Standards Update Adopted Remaining grant to be received Remaining Grant Amount Remaining grant amount. ASU 2018-07 Accounting Standards Update201807 [Member] ASU 2016-02 Accounting Standards Update201602 [Member] Accounting Standards Update Type Of Adoption [Member] Accounting Standards Update Adjustments For New Accounting Pronouncements [Axis] Subsequent Event Subsequent Event [Member] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Event Type Subsequent Event Type [Axis] National Institute on Aging of the National Institutes of Health National Institute On Aging Of The National Institutes Of Health [Member] National institute on aging of the national institutes of health. Alzheimers Association Alzheimers Association [Member] Alzheimers Association. Collaborative Arrangement and Arrangement Other than Collaborative Arrangements And Nonarrangement Transactions [Member] Collaborative Arrangement and Arrangement Other than Collaborative Type Of Arrangement [Axis] Grant received Grants received Grants Received Grants received. Research grant awarded Grants Awarded Grants awarded. National Institutes of Health Grant National Institutes Of Health Grant [Member] National institutes of health grant member. Alzheimer's Association Part the Cloud Research Grant Alzheimer S Association Part Cloud Research Grant [Member] Alzheimer's association part the cloud research grant member. Product and Service Products And Services [Domain] Product and Service Product Or Service [Axis] Basis Of Presentation And Significant Accounting Policies [Table] Shares Outstanding Shares, Beginning Balance Shares, Ending Balance Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number Shares, Forfeited/expired Options forfeited, cancelled, or expired Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period 2020 Plan reserve increase on January 1, 2021 Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Period Increase Decrease Available for Grant, Beginning Balance Available for Grant, Ending Balance Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Options and restricted stock units granted Share Based Compensation Arrangement By Share Based Payment Award Options And Restricted Stock Unit Granted Share based compensation arrangement by share based payment award options and restricted stock unit granted. Weighted-average grant-date fair value of options granted Share Based Compensation Arrangement By Share Based Payment Award Options Weighted Average Grant Date Fair Value Of Options Granted Share-based compensation arrangement by share based payment award options, weighted average grant date fair value of options granted. Expected term (in years) Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 Expected volatility Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Risk-free interest rate Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Expected 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 [Line Items] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Restricted Stock Award (RSA) Restricted Stock [Member] Non-employees Non Employees [Member] Non-employees. Advisors Advisors [Member] Advisors. Employees and Directors Employees And Directors [Member] Employees and directors. Title of Individual Title Of Individual With Relationship To Entity [Domain] Title of Individual Title Of Individual [Axis] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Basis Of Presentation And Significant Accounting Policies [Table] Basis of presentation and significant accounting policies. Basis Of Presentation And Significant Accounting Policies [Line Items] Basis Of Presentation And Significant Accounting Policies [Line Items] Basis of presentation and significant accounting policies. Cash, cash equivalents, and investments Cash Cash Equivalents And Short Term And Long Term Investments Cash, cash equivalents and short-term and long-term investments. Net cash proceeds from issuance of convertible preferred stock, common stock warrants, and convertible notes Proceeds From Issuance Of Convertible Preferred Stock And Common Stock Warrants Proceeds from issuance of convertible preferred stock and common stock warrants. Public offering price per share Sale Of Stock Price Per Share Number of shares issued and sold Stock Issued During Period Shares New Issues Net proceeds from public offering Proceeds From Issuance Follow On Public Offering Proceeds from issuance follow on public offering. Entity incorporation, date of Incorporation Entity Incorporation Date Of Incorporation Underwriters’ Option Over Allotment Option [Member] Follow-on Public Offering Reconciliation of Undiscounted Operating Lease Cash Flows to Operating Lease Liability Payments Lessee Operating Lease Liability Maturity Table [Text Block] Schedule of Other Income (Expense), Net Schedule Of Other Nonoperating Income Expense Table [Text Block] Schedule Of Accrued Liabilities Table [Text Block] Schedule of Property and Equipment Property Plant And Equipment [Text Block] Schedule of Fair Value of Cash Equivalents, Short-term Investments and Long-term Investments Fair Value Assets Measured On Recurring Basis [Text Block] Summary of Amounts Recorded in the Accompanying Balance Sheets as Receivables from the Granting Agencies Schedule Of Unbilled Grant Receivables Table [Text Block] Schedule of unbilled grant receivables table text block. Summary of Grant Income in the Accompanying Statements of Operations Schedule Of Grant Income Table [Text Block] Schedule of grant income table text block. Recently Adopted Accounting Pronouncements Adopted and Not Yet Adopted New Accounting Pronouncements Policy Policy [Text Block] Emerging Growth Company Status Emerging Growth Company Status Policy [Text Block] Emerging growth company status. Segments Segment Reporting Policy Policy [Text Block] Net Loss Per Share Attributable to Common Stockholders Earnings Per Share Policy [Text Block] Stock-based Compensation Share Based Compensation Option And Incentive Plans Policy Leases Lessee Leases Policy [Text Block] Research and Development Expenses Research And Development Expense Policy Use of Estimates Use Of Estimates Short-term and Long-term Investments Investment Policy [Text Block] Grant Income Grant Income Policy [Text Block] Grant income policy. Convertible Preferred Stock Warrant Liability Convertible Preferred Stock Warrant Liability Policy [Text Block] Convertible preferred stock warrant liability. Fair Value Measurements Fair Value Measurement Policy Policy [Text Block] Unaudited Interim Condensed Financial Statements Unaudited Interim Condensed Financial Statements Policy [Text Block] Unaudited interim condensed financial statements. Basis of Presentation Basis Of Accounting Policy Policy [Text Block] Net Loss Per Share Attributable to Common Stockholders Earnings Per Share [Text Block] Earnings Per Share [Abstract] Stock-based Compensation Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Common Stock Stockholders Equity Note Disclosure [Text Block] Convertible Preferred Stock Preferred Stock [Text Block] Equity [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Debt Disclosure [Text Block] Debt Disclosure [Abstract] Significant Agreements Collaborative Arrangement Disclosure [Text Block] Other Income (Expense), Net Other Nonoperating Income And Expense [Text Block] Other Income And Expenses [Abstract] Accounts Payable Accrued Liabilities And Other Liabilities Disclosure Current [Text Block] Payables And Accruals [Abstract] Property and Equipment, Net Property Plant And Equipment Disclosure [Text Block] Property Plant And Equipment [Abstract] Fair Value Fair Value Disclosures [Text Block] Fair Value Disclosures [Abstract] Significant Accounting Policies Significant Accounting Policies [Text Block] Accounting Policies [Abstract] Description of Business Nature Of Operations Organization Consolidation And Presentation Of Financial Statements [Abstract] Right-of-use asset obtained in exchange for new operating lease liability Right Of Use Asset Obtained In Exchange For Operating Lease Liability Issuance of Series B-1 preferred stock upon conversion of promissory notes Stock Issued1 Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect Net cash provided by financing activities Net Cash Provided By Used In Financing Activities Proceeds from issuance of convertible notes, including derivative, net of issuance costs Proceeds From Convertible Debt Proceeds from follow-on public offering, net of issuance costs Proceeds From Issuance Initial Public Offering Financing activities Net Cash Provided By Used In Financing Activities [Abstract] Net Cash Provided By Used In Investing Activities Principal payments received on stockholder note receivable Proceeds From Collection Of Loans Receivable Purchases of property and equipment Payments To Acquire Property Plant And Equipment Proceeds from sales of available-for-sale securities Proceeds From Sale Of Available For Sale Securities Maturities of available-for-sale securities Proceeds From Sale Of Available For Sale Securities Debt Purchases of available-for-sale securities Payments To Acquire Available For Sale Securities Debt Investing activities Net Cash Provided By Used In Investing Activities [Abstract] Net cash used in operating activities Net Cash Provided By Used In Operating Activities Operating lease liability Increase Decrease In Operating Lease Liability Increase Decrease In Accounts Payable And Accrued Liabilities Prepaid expenses and other current assets Increase Decrease In Prepaid Deferred Expense And Other Assets Changes in operating assets and liabilities: Increase Decrease In Operating Capital [Abstract] Amortization of premiums and accretion of discounts on available-for-sale securities, net Debt conversion, converted instrument, amount Debt Conversion Converted Instrument Amount1 Debt instrument, repurchase price, percentage Debt Instrument Redemption Price Percentage Debt instrument, conversion price, percentage Debt Instrument Convertible Threshold Percentage Of Stock Price Trigger Debt instrument, payment terms Debt Instrument Payment Terms Debt instrument, principal amount Debt Instrument Face Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Series B-1 Convertible Preferred Stock Series B1 Convertible Preferred Stock [Member] Series B-1 convertible preferred stock. Unsecured Convertible Notes Unsecured Convertible Notes [Member] Unsecured convertible notes. Long-term Debt, Type Longterm Debt Type [Domain] Long-term Debt, Type Longterm Debt Type [Axis] Debt Instrument [Table] Debt Instrument [Table] Debt instrument, maturity month and year Debt Instrument Maturity Month And Year Debt instrument, maturity month and year. Estimated fair value of the grant liability Estimated Fair Value Of Grant Liability Estimated fair value of grant liability. Grant liability payable amount, maximum Grant Liability Maximum Amount Payable Under Agreement Grant liability maximum amount payable under agreement. Royalty obligation Royalty Obligation Royalty obligation. Net sales exempt from royalty payment Net Sales Exempt From Royalty Payment Net sales exempt from royalty payment. Annual minimum royalty payments Annual Minimum Royalty Payments After First Commercial Sale Annual minimum royalty payments after first commercial sale. Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] Other Income (Expense), Net Nonoperating Income Expense [Member] Income Statement Location Income Statement Location [Domain] Income Statement Location Income Statement Location [Axis] Washington Life Services Discovery Fund Grant Agreement Washington Life Services Discovery Fund Grant Agreement [Member] Washington life services discovery fund grant agreement. Phase 3 Clinical Trial Initiation Phase Three Clinical Trail Initiation Of License Agreement [Member] Phase three clinical trail initiation of license agreement. Phase 2 Clinical Trial Initiation Phase Two Clinical Trail Initiation Of License Agreement [Member] Phase two clinical trail initiation of license agreement. Research and Development Arrangement, Contract to Perform for Others, Type Research And Development Arrangement Contract To Perform For Others Type [Domain] Research and Development Arrangement, Contract to Perform for Others, Type Research And Development Arrangement Contract To Perform For Others By Type [Axis] Washington State University License Agreement Washington State University License Agreement [Member] Washington state university license agreement. Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] Milestone payments on development milestone achieved Payment On Achievement Of Development Milestone Payment on achievement of development milestone. Milestone payments payable upon marketing approval Milestone Payments Amount Payable Upon Marketing Approval Milestone payments amount payable upon marketing approval. Milestone payments, amount payable Milestone Payments Amount Payable Upon Trial Initiation Milestone payments amount payable upon trial initiation. Total other income (expense), net Nonoperating Income Expense Gain on extinguishment of debt Gain on extinguishment of convertible notes Gains Losses On Extinguishment Of Debt Interest expense Interest Expense Interest and other income Interest And Other Income Change in fair value of grant liability Change in fair value of grant liability Change In Fair Value Of Grant Liability Change in fair value of grant liability. Change in fair value of derivative liability Change In Fair Value Of Derivative Liability Change in fair value of derivative liability. Employee compensation and benefits Employee Related Liabilities Current Professional services and other Accrued Professional Services And Other Current Accrued professional services and other, current. Research and development expenses Accrued Research And Development Expenses Current Accrued research and development expenses, current. Less: accumulated depreciation Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Property and equipment, at cost Property Plant And Equipment Gross Property Plant And Equipment [Line Items] Property Plant And Equipment [Line Items] Construction in Progress Construction In Progress [Member] Leasehold Improvement Leasehold Improvements [Member] Office Furniture, Fixtures, and Computer Equipment Furniture Fixtures And Computer Equipment [Member] Furniture, fixtures and computer equipment. Lab Equipment Laboratory Equipment [Member] Laboratory equipment. Long-Lived Tangible Asset Property Plant And Equipment Type [Domain] Long-Lived Tangible Asset Property Plant And Equipment By Type [Axis] Schedule Of Property Plant And Equipment [Table] Schedule Of Property Plant And Equipment [Table] Maximum Maximum [Member] Maximum [Member] Minimum Minimum [Member] Minimum [Member] Statistical Measurement Range [Member] Statistical Measurement Range [Axis] Long-term investments effective maturity date Long Term Investments Maturity Term Accretion Amortization Of Discounts And Premiums Investments Other non-cash expense Other Noncash Expense Depreciation expense Depreciation Stock-based compensation Share Based Compensation 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] Net loss Profit Loss Operating activities Net Cash Provided By Used In Operating Activities [Abstract] Statement Of Cash Flows [Abstract] Recognition of derivative liability upon issuance of convertible notes Recognition Of Derivative Liability Upon Issuance Of Convertible Notes Recognition of derivative liability upon issuance of convertible notes. Recognition of warrant liability in connection with Series B convertible preferred stock financing Recognition Of Warrant Liability In Connection With Convertible Preferred Stock Financing Recognition of warrant liability in connection with convertible preferred stock financing. Allocation of proceeds to common stock warrants issued in Series B convertible preferred stock financing Proceeds To Common Stock Warrants Issued In Convertible Preferred Stock Financing Proceeds to common stock warrants issued in Series B convertible preferred stock financing. Deferred offering costs included in accounts payable and accrued liabilities Deferred Offering Costs Included In Accounts Payable And Accrued Liabilities Deferred offering costs included in accounts payable and accrued liabilities. Proceeds from exercise of common stock warrants Proceeds From Exercise Of Common Stock Warrants Proceeds from exercise of common stock warrants. Proceeds from issuance of convertible preferred stock and common stock warrants, net of issuance costs Proceeds From Sales Of Convertible Preferred Stock And Stock Warrants Net Of Issuance Costs Proceeds from sales of convertible preferred stock and stock warrants, net of issuance costs. Proceeds from exercise of common stock options Proceeds From Exercise Of Common Stock Options Proceeds from exercise of common stock options. Increase Decrease In Unbilled Grant Receivables Increase (decrease) in unbilled grant receivables. Issuance of Series B convertible preferred stock and common stock warrants, issuance costs Adjustments To Additional Paid In Capital Stock Issued Issuance Costs Other Comprehensive Income Loss Net Of Tax Stock-based compensation Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Issued common stock, share under employee stock purchase plan Issuance of common stock under employee stock purchase plan, shares Stock Issued During Period Shares Employee Stock Purchase Plans Issuance of common stock under employee stock purchase plan Stock Issued During Period Value Employee Stock Purchase Plan Issuance of the Series B-1 convertible preferred stock upon conversion of convertible notes Stock Issued During Period Value Conversion Of Convertible Securities Issuance of Series B convertible preferred stock and common stock warrants, net of issuance costs of $3.5 million Stock And Warrants Issued During Period Value Preferred Stock And Warrants Shares, Exercised Issuance of common stock upon exercise of common stock options, shares Stock Issued During Period Shares Stock Options Exercised Issuance of common stock upon exercise of common stock options Stock Issued During Period Value Stock Options Exercised Beginning balance, shares Ending balance, shares Shares Outstanding Temporary equity, beginning balance Temporary equity, ending balance Temporary Equity Carrying Amount Attributable To Parent Temporary equity, beginning balance, shares Temporary equity, ending balance, shares Temporary Equity Shares Outstanding Statement [Line Items] Statement [Line Items] Convertible Preferred Stock Convertible Preferred Stock [Member] Class of Stock Class Of Stock [Domain] Class of Stock Statement Class Of Stock [Axis] Accumulated Deficit Retained Earnings [Member] Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income [Member] Additional Paid-In Capital Additional Paid In Capital [Member] Common Stock Common Stock [Member] Equity Component Equity Component [Domain] Equity Components Statement Equity Components [Axis] Statement [Table] Statement [Table] Statement Of Stockholders Equity [Abstract] Issuance Of Common Stock Shares During The Period Initial Public Offering Net Of Underwriters Discounts And Commissions Issuance of common stock shares during the period initial public offering, net of underwriters' discounts and commissions. Issuance Of Common Stock Value During The Period Initial Public Offering Net Of Underwriters Discounts And Commissions Issuance of common stock value during the period initial public offering, net of underwriters' discounts and commissions. Issuance of common stock upon exercise of common stock options and vesting of restricted stock units, Shares Issuance Of Common Stock Share Exercise Of Common Stock Options And Vesting Of Restricted Stock Units Issuance of common stock share exercise of common stock options and vesting of restricted stock units. Issuance of common stock upon exercise of common stock options and vesting of restricted stock units Issuance Of Common Stock Upon Exercise Of Common Stock Options And Vesting Of Restricted Stock Units Issuance of common stock upon exercise of common stock options and vesting of restricted stock units. Exercise of common stock warrants, shares Stock Issued During Period Shares Warrants Exercised Stock issued during period, shares, warrants exercised. Exercise of common stock warrants Stock Issued During Period Value Warrants Exercised Stock issued during period, value, warrants exercised. Temporary Equity, Issuance of the Series B-1 convertible preferred stock upon conversion of convertible notes Temporary Equity Stock Issued During Period Value Conversion Of Convertible Securities Temporary equity, stock issued during period, value, conversion of convertible securities. Temporary Equity, Issuance of the Series B-1 convertible preferred stock upon conversion of convertible notes, shares Temporary Equity Stock Issued During Period Shares Conversion Of Convertible Securities Temporary equity, stock issued during period, shares, conversion of convertible securities. Temporary Equity, Issuance of Series B convertible preferred stock and common stock warrants, net Temporary Equity Stock And Warrants Issued During Period Value Preferred Stock And Warrants Temporary equity stock and warrants issued during period, value, preferred stock and warrants. Temporary Equity, Issuance of Series B convertible preferred stock and common stock warrants, net, shares Temporary Equity Stock And Warrants Issued During Period Shares Preferred Stock And Warrants Temporary equity stock and warrants issued during period, shares, preferred stock and warrants. 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 Net loss per share attributable to common stockholders, basic and diluted Earnings Per Share Basic And Diluted Comprehensive loss attributable to common stockholders Comprehensive Income Net Of Tax Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent Net loss Net loss Net Income Loss Other income (expense), net Other Nonoperating Income Expense Loss from operations Operating Income Loss Total operating expenses Costs And Expenses General and administrative General And Administrative Expense Research and development Research And Development Expense Operating expenses: Operating Expenses [Abstract] Statement Of Income And Comprehensive Income [Abstract] Grant income Grant Income Grant income. Common stock, shares outstanding Common Stock Shares Outstanding Common stock, shares issued Common Stock Shares Issued Follow On Public Offering [Member] Follow-on public offering. Sale of Stock Sale Of Stock Name Of Transaction [Domain] Sale of Stock Subsidiary Sale Of Stock [Axis] Description Of Business [Table] Description Of Business [Table] Description of business. Description Of Business [Line Items] Description Of Business [Line Items] Description of business. Entity reincorporation, date of reincorporation Entity Reincorporation Date Of Reincorporation Entity reincorporation, date of reincorporation. Summary of Dilutive Securities Excluded from Computation of Diluted Net Loss Per Share Attributable to Common Stockholders Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Text Block] Summary of Restricted Stock Activity Schedule Of Sharebased Compensation Restricted Stock And Restricted Stock Units Activity Table [Text Block] Summary of Stock Options Outstanding and Exercisable under the 2020 Plan Schedule Of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range [Text Block] Summary of Option Activity under the 2020 Plan Schedule Of Share Based Compensation Stock Options Activity Table [Text Block] Summary of Option Activity Changes in Shares Available for Grant under the 2020 Plan Schedule Of Share Based Compensation Arrangement Shares Available For Grant Table [Text Block] Schedule of share based compensation arrangement shares available for grant. Weighted-Average Assumptions used in Estimating Fair Value of each Stock Options using Black-Scholes Option-Pricing Model Schedule Of Share Based Payment Award Stock Options Valuation Assumptions Table [Text Block] Stock-based Compensation Expense Recognized Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Text Block] Schedule of Reserved Shares of Common Stock for Future Issuance Schedule Of Reserved Shares Of Common Stock For Future Issuance Table [Text Block] Schedule of reserved shares of common stock for future issuance. Weighted Average Remaining Lease Term and Weighted Average Discount Rate to Determine the Operating Lease Liability Lease Cost Table [Text Block] Common stock, shares authorized Common Stock Shares Authorized Common stock, par value Common Stock Par Or Stated Value Per Share Total liabilities and stockholders' equity Liabilities And Stockholders Equity Total stockholders' equity Beginning balance Ending balance Stockholders Equity Accumulated deficit Retained Earnings Accumulated Deficit Accumulated other comprehensive income Accumulated Other Comprehensive Income Loss Net Of Tax Additional paid-in capital Additional Paid In Capital Common Stock Common Stock Value Stockholders' equity: Stockholders Equity [Abstract] Total liabilities Liabilities Operating lease liability, less current portion Operating Lease Liability Noncurrent Total current liabilities Liabilities Current Current operating lease liability Operating Lease Liability Current Accrued liabilities Accrued Liabilities Current Accounts payable Accounts Payable Current Current liabilities: Liabilities Current [Abstract] Liabilities and stockholders' equity Liabilities And Stockholders Equity [Abstract] Total assets Assets Other long-term assets Other Assets Noncurrent Long-term investments Long Term Investments Operating lease right-of-use asset Operating Lease Right Of Use Asset Property and equipment, net Property and equipment, net Property Plant And Equipment Net Total current assets Assets Current Prepaid expenses and other current assets Prepaid Expense And Other Assets Current Short-term investments Short Term Investments Cash equivalents, Amortized Cost Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Current assets: Assets Current [Abstract] Assets Assets [Abstract] Statement Of Financial Position [Abstract] Unbilled grant receivable Unbilled Grant Receivable Current Unbilled grant receivable current. Security Exchange Name Security Exchange Name Trading Symbol Trading Symbol Security12b Title Security12b Title Document Transition Report Document Transition Report Document Quarterly Report Document Quarterly Report Local Phone Number Local Phone Number City Area Code City Area Code Entity Address, Postal Zip Code Entity Address Postal Zip Code Entity Address, State or Province Entity Address State Or Province Entity Address, City or Town Entity Address City Or Town Entity Address, Address Line Two Entity Address Address Line2 Entity Address, Address Line One Entity Address Address Line1 Entity Tax Identification Number Entity Tax Identification Number Entity Incorporation, State or Country Code Entity Incorporation State Country Code Entity File Number Entity File Number Entity Ex Transition Period Entity Ex Transition Period Entity Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Entity Shell Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Entity Filer Category Entity Filer Category Current Fiscal Year End Date Current Fiscal Year End Date Entity Interactive Data Current Entity Interactive Data Current Entity Current Reporting Status Entity Current Reporting Status Entity Registrant Name Entity Registrant Name Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Type Document Type Cover [Abstract] Tenant improvement allowance receivable Tenant Improvement Allowance Receivable Tenant improvement allowance receivable. Thereafter Lessee Operating Lease Liability Payments Due After Year Four Lessee operating lease liability payments due after year four. Cash equivalents, Unrealized Losses Cash And Cash Equivalents Accumulated Gross Unrealized Loss Before Tax Cash and cash equivalents accumulated gross unrealized loss before tax. Cash equivalents, Unrealized Gains Cash And Cash Equivalents Accumulated Gross Unrealized Gain Before Tax Cash and cash equivalents accumulated gross unrealized gain before tax. Entity Central Index Key Entity Central Index Key