Segment Reporting, Policy [Policy Text Block] Segments Litigation Case [Axis] Litigation Case Basis of presentation and significant accounting policies. Basis Of Presentation And Significant Accounting Policies [Table] Basis Of Presentation And Significant Accounting Policies [Table] Operating Expenses [Abstract] Operating expenses: Asset Class [Domain] Asset Class Operating Income (Loss) Loss from operations Operating Income (Loss), Total Increase (Decrease) in Operating Lease Liability Operating lease liability Entity Emerging Growth Company Entity Emerging Growth Company Investment, Policy [Policy Text Block] Short-term and Long-term Investments Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block] Summary of Stock Options Outstanding and Exercisable under the 2020 Plan Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets, Total Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Weighted-Average Grant Date Fair Value, Non-vested, Cancelled Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Available for Grant, Ending Balance Available for Grant, Beginning Balance Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment, Total Geographical [Axis] Geographical Common stock, $0.0001 par value; 900,000,000 shares authorized at June 30, 2022 and December 31, 2021, respectively; 37,817,724 and 37,379,077 shares issued and outstanding at June 30, 2022 and December 31,2021, respectively Common Stock, Value, Issued Common Stock, Value, Issued, Total Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Ending Balance Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Summary of Restricted Stock Activity Entity Address, State or Province Entity Address, State or Province Share-based Payment Arrangement, Option, Exercise Price Range [Table] Schedule Of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range [Table] Liabilities Total liabilities Unrealized (loss) gain on available-for-sale securities Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent, Total Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Risk-free interest rate Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] Other Income and Expenses [Abstract] Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted Weighted Average Number of Shares Outstanding, Basic and Diluted Exercise price three. Exercise Price Three [Member] Exercise Price $20.55 to 29.41 General and Administrative Expense [Member] General and Administrative Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Weighted-Average Remaining Contractual Term, Options exercisable (in years) Debt Securities, Available-for-sale, Current Investments, Fair Value Debt Securities, Available-for-sale, Current, Total Entity reincorporation, date of reincorporation. Entity Reincorporation Date Of Reincorporation Entity reincorporation, date of reincorporation Significant Accounting Policies [Text Block] Significant Accounting Policies City Area Code City Area Code Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Weighted-Average Assumptions used in Estimating Fair Value of each Stock Options using Black-Scholes Option-Pricing Model Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Summary of Dilutive Securities Excluded from Computation of Diluted Net Loss Per Share Attributable to Common Stockholders Stock Issued During Period, Shares, New Issues Number of shares issued and sold Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Grants awarded. Grants Awarded Research grant awarded Follow-on public offering. Follow On Public Offering [Member] Follow-on Public Offering Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Capital Expenditures Incurred but Not yet Paid Purchases of property and equipment included in accounts payable and accrued liabilities Employee-related Liabilities, Current Employee compensation and benefits Employee-related Liabilities, Current, Total 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 Options and restricted stock units granted General and Administrative Expense General and administrative General and Administrative Expense, Total Property, Plant and Equipment, Net Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Ending Balance Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Issued, Total Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Cancelled Share Equivalent, Cancelled Bothell, Washington. Bothell Washington [Member] Bothell, Washington Statement of Comprehensive Income [Abstract] Debt Securities, Available-for-sale, Amortized Cost Investments, Amortized Cost Operating Lease, Right-of-Use Asset Operating lease right-of-use asset Security Exchange Name Security Exchange Name Statistical Measurement [Domain] Statistical Measurement Wang V. Athira Pharma, Inc. Wang V Athira Pharma Inc [Member] Wang V. Athira Pharma Inc., Cash and Cash Equivalents, Fair Value Disclosure Cash equivalents, Fair Value Document Period End Date Document Period End Date Restricted Cash, Noncurrent Restricted cash Long-term Investments. 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Royalty Obligation Royalty obligation Stock options to purchase common stock. Stock Options To Purchase Common Stock [Member] Stock Options to Purchase Common Stock Issuance Of Common Stock Upon Exercise Of Common Stock Options And Vesting Of Restricted Stock Unit Shares Issuance Of Common Stock Upon Exercise Of Common Stock Options And Vesting Of Restricted Stock Unit Shares Issuance of common stock upon exercise of common stock options and vesting of restricted stock units, Shares Entity Address, Address Line Two Entity Address, Address Line Two Current Fiscal Year End Date Current Fiscal Year End Date Net (decrease) increase in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Increase (decrease) in unbilled grant receivables. Increase Decrease In Unbilled Grant Receivables Unbilled grant receivable Phase three clinical trail initiation of license agreement. Phase Three Clinical Trail Initiation Of License Agreement [Member] Phase 3 Clinical Trial Initiation Lessee, Operating Lease, Existence of Option to Extend [true false] Operating lease existence of option to extend Assets [Abstract] Assets Lessee, Operating Lease, Liability, to be Paid, Year One 2023 Accounts Payable, Current Accounts payable Accounts Payable, Current, Total US Government Agencies Debt Securities [Member] U.S. Government Debt and Agency Securities Common Stock, Par or Stated Value Per Share Common stock, par value Weighted-average shares used in computing net loss per share attributable to common stockholders, basic Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Basic, Total Shares, Outstanding Ending balance, shares Beginning balance, shares Additional Paid in Capital, Common Stock Additional paid-in capital Additional Paid in Capital, Common Stock, Beginning Balance Additional Paid in Capital, Common Stock, Ending Balance Research and Development Expense, Policy [Policy Text Block] Research and Development Expenses Document Type Document Type Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan Revision of Prior Period [Axis] Issuance of common stock under employee stock purchase plan, shares Stock Issued During Period, Shares, Employee Stock Ownership Plan Operating Lease, Liability, Noncurrent Operating lease liability, less current portion Schedule of Accrued Liabilities [Table Text Block] Schedule of Accrued Liabilities Assets, Current Total current assets Share-based Payment Arrangement [Policy Text Block] Stock-based Compensation Other Nonoperating Income and Expense [Text Block] Other Income, Net Research and Development Arrangement, Contract to Perform for Others, Type [Axis] Research and Development Arrangement, Contract to Perform for Others, Type Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted-Average Remaining Contractual Term (in years) Share Based Compensation Arrangement By Share based Payment Award Options Grants In Period Fair Value Share Based Compensation Arrangement By Share based Payment Award Options Grants In Period Fair Value Fair value of options granted Entity Incorporation, Date of Incorporation Entity incorporation, date of Incorporation Net loss per share attributable to common stockholders, basic and diluted Earnings Per Share, Basic and Diluted Earnings Per Share, Basic and Diluted, Total Antidilutive Securities [Axis] Antidilutive Securities Non-vested at June 30, 2022 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Non-vested at December 31, 2021 Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Aggregate Intrinsic Value, Expected to vest Issuance of common stock value during period follow-on public offering, net of underwriters' discounts and commissions. 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Grant Income Grant income Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated other comprehensive loss Entity Address, Address Line One Entity Address, Address Line One Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Aggregate intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Shares, Ending Balance Shares, Beginning Balance Shares Outstanding Short-term investments maturity term. Short Term Investments Maturity Term Short-term investments effective maturity date Proceeds from exercise of common stock options. 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Accrued Research And Development Expenses Current Research and development expenses Cash, cash equivalents and restricted cash, end of period Cash, cash equivalents and restricted cash, beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Cash, cash equivalents and restricted cash Equity Components [Axis] Equity Components Weighted Average Remaining Lease Term and Weighted Average Discount Rate and Operating Lease Expense and Variable Lease Expense Lease, Cost [Table Text Block] Assets, Current [Abstract] Current assets: Description of business. Description Of Business [Line Items] Description Of Business [Line Items] Variable Lease, Cost Variable lease expense Entity Registrant Name Entity Registrant Name As Reported Previously Reported [Member] Stockholders' Equity Note Disclosure [Text Block] Common Stock Entity Interactive Data Current Entity Interactive Data Current Entity Address, City or Town Entity Address, City or Town Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected term (in years) Trading Symbol Trading Symbol Payment on achievement of development milestone. Payment On Achievement Of Development Milestone Milestone payments on development milestone achieved Laboratory equipment. Laboratory Equipment [Member] Lab Equipment Net Cash Provided by (Used in) Investing Activities [Abstract] Investing activities Lessee, Operating Lease, Liability, Undiscounted Excess Amount Present value adjustment for minimum lease commitments Furniture, fixtures and computer equipment. Furniture Fixtures And Computer Equipment [Member] Office Furniture, Fixtures, and Computer Equipment Short-term Investments [Member] Short-term Investments Local Phone Number Local Phone Number Description of business. Description Of Business [Table] Description Of Business [Table] 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 Stockholders' Equity Attributable to Parent Ending balance Beginning balance Total stockholders' equity Milestone payments amount payable upon marketing approval. Milestone Payments Amount Payable Upon Marketing Approval Milestone payments payable upon marketing approval Statistical Measurement [Axis] Statistical Measurement Proceeds from issuance follow on public offering. Proceeds From Issuance Follow On Public Offering Net proceeds from public offering Share-based compensation arrangement by share-based payment award, options and restricted stock units, forfeited, cancelled or expired. 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Grant Income Policy [Text Block] Grant Income Schedule of Other Nonoperating Income (Expense) [Table Text Block] Schedule of Other Income, Net Cash, cash equivalents and short-term and long-term investments. Cash Cash Equivalents And Short Term And Long Term Investments Cash, cash equivalents, and investments Fair Value Measurement, Policy [Policy Text Block] Fair Value Measurements Fair Value, Assets Measured on Recurring Basis [Table Text Block] Schedule of Fair Value of Cash Equivalents, Short-term Investments and Long-term Investments Emerging growth company status. Emerging Growth Company Status Policy [Text Block] Emerging Growth Company Status Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted-Average Exercise price per Share, Granted Sale of Stock [Domain] Sale of Stock Equity [Abstract] Exercise Price $8.93 to 19.94 Exercise price two. Exercise Price Two [Member] Tow thousand and twenty employee stock purchase plan. Tow Thousand And Twenty Employee Stock Purchase Plan [Member] 2020 Employee Stock Purchase Plan Plan Name [Domain] Plan Name Class of Stock [Line Items] Class Of Stock [Line Items] Depreciation Depreciation expense Depreciation, Total Lessee, Operating Lease, Term of Contract Operating lease initial term Loss Contingency, Lawsuit Filing Date Lawsuit filing date Two thousand and twenty equity incentive plan. Two Thousand And Twenty Equity Incentive Plan [Member] 2020 Equity Incentive Plan Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Phase two clinical trail initiation of license agreement. Phase Two Clinical Trail Initiation Of License Agreement [Member] Phase 2 Clinical Trial Initiation Debt Securities, Available-for-sale, Noncurrent Investments, Fair Value Share-based Payment Arrangement, Noncash Expense Stock-based compensation Share-based Payment Arrangement, Noncash Expense, Total Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Share-based Payment Arrangement, Option, Activity [Table Text Block] Summary of Option Activity under the 2020 Plan Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset Interest and Other Income Interest and other income Interest and Other Income, Total Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Shares, Options exercisable Shares Exercisable Shares issuable upon the exercise of outstanding common stock options and the vesting of outstanding common restricted stock units granted. Shares Issuable Upon The Exercise Of Outstanding Common Stock Options and the Vesting of Outstanding Common Restricted Stock Units Granted Member Shares Issuable Upon the Exercise of Outstanding Common Stock Options and the Vesting of Outstanding Common Restricted Stock Units Granted Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Commitments and Contingencies Disclosure [Abstract] Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Right-of-use asset obtained in exchange for new operating lease liability 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, Vested Assets Total assets Fair Value, Inputs, Level 2 [Member] Level 2 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Issuance of common stock upon exercise of common stock options, shares Shares, Exercised Litigation Case [Domain] Litigation Case Statement [Line Items] Statement [Line Items] Liabilities and Equity Total liabilities and stockholders' equity Document Quarterly Report Document Quarterly Report Property, Plant and Equipment [Abstract] Statement of Cash Flows [Abstract] Additional Paid-in Capital [Member] Additional Paid-In Capital Title of 12(b) Security Security12b Title Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive loss attributable to common stockholders Commitment and contingencies. Commitment And Contingencies [Table] Commitment And Contingencies [Table] Award Type [Domain] Award Type Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV Increase (Decrease) in Accounts Payable and Accrued Liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities, Total Accounts payable and accrued liabilities Property, Plant and Equipment [Table Text Block] Schedule of Property and Equipment Fair Value, Inputs, Level 1 [Member] Level 1 Research and Development Arrangement, Contract to Perform for Others, Type [Domain] Research and Development Arrangement, Contract to Perform for Others, Type Nonoperating Income (Expense) Total other income, net Fair Value, by Balance Sheet Grouping [Table] Fair Value By Balance Sheet Grouping [Table] 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, Expected to vest Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Shares, Granted Entity Current Reporting Status Entity Current Reporting Status Collaborative Arrangement Disclosure [Text Block] Significant Agreements Investment Type [Axis] Investment Type Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Money Market Funds [Member] Money Market Fund 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, Granted Earnings Per Share, Policy [Policy Text Block] Net Loss Per Share Attributable to Common Stockholders Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Stock-based Compensation Expense Recognized Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Remaining 2022 Long-term investments maturity term. Long Term Investments Maturity Term Long-term investments effective maturity date AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) Laboratory and office facilities. Laboratory And Office Facilities [Member] Laboratory and Office Facilities Lessee operating lease liability payments due after year three. Lessee Operating Lease Liability Payments Due After Year Three Thereafter Income Statement Location [Domain] Income Statement Location Licensed Products. Licensed Products [Member] Net loss per share attributable to common stockholders, basic Earnings Per Share, Basic Earnings Per Share, Basic, Total Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted-Average Exercise price per Share, Options exercisable Minimum [Member] Minimum [Member] Minimum 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] Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Weighted-Average Remaining Contractual Term, Expected to vest (in years) Measurement Frequency [Domain] Measurement Frequency Stock Issued During Period, Value, Stock Options Exercised Issuance of common stock upon exercise of common stock options Unaudited interim condensed financial statements. Unaudited Interim Condensed Financial Statements Policy [Text Block] Unaudited Interim Condensed Financial Statements Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Granted, shares Share Equivalent, Granted Proceeds from issuance of convertible preferred stock and common stock warrants. 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Cash And Cash Equivalents Accumulated Gross Unrealized Gain Before Tax Cash equivalents, Unrealized Gains Entity Filer Category Entity Filer Category Document Fiscal Year Focus Document Fiscal Year Focus Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Shares, Expected to vest Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Grants received. Grants Received Grants received Grant received Construction in Progress [Member] Construction in Progress Loss Contingency, Name of Plaintiff Name of plaintiff Immaterial Error Correction (Unaudited) Error Correction [Text Block] Retained Earnings (Accumulated Deficit) Accumulated deficit Retained Earnings (Accumulated Deficit), Total Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Ending Balance Entity Ex Transition Period Entity Ex Transition Period Fair Value Disclosures [Abstract] Property, Plant and Equipment Disclosure [Text Block] Property and Equipment, Net Maximum [Member] Maximum [Member] Maximum Entity Central Index Key Entity Central Index Key Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Restricted Cash Share based compensation shares authorized under stock option plans exercise price. Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Exercise Price ($) Payables and Accruals [Abstract] Operating Lease, Expense Operating lease expense Unvested RSAs Unvested Restricted Stock Awards [Member] Unvested restricted stock awards. Non-vested Restricted Stock Awards Prior Period Adjustment [Abstract] Unbilled grant receivable current. Unbilled Grant Receivable Current Unbilled grant receivable Entity Tax Identification Number Entity Tax Identification Number Equity Component [Domain] Equity Component Cash and cash equivalents accumulated gross unrealized loss before tax. Cash And Cash Equivalents Accumulated Gross Unrealized Loss Before Tax Cash equivalents, Unrealized Losses 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 Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected volatility Milestone payments amount payable upon trial initiation. Milestone Payments Amount Payable Upon Trial Initiation Milestone payments, amount payable Other expense Other Nonoperating Expense Other Nonoperating Expense, Total Washington state university license agreement. Washington State University License Agreement [Member] Washington State University License Agreement Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Remaining weighted-average period expected to recognize unrecognized compensation cost Non-vested restricted stock units member. Non Vested Restricted Stock Units [Member] Non-vested Restricted Stock Units Leasehold Improvements [Member] Leasehold Improvement Schedule of share based compensation arrangement shares available for grant. Schedule Of Share Based Compensation Arrangement Shares Available For Grant Table [Text Block] Summary of Option Activity Changes in Shares Available for Grant under the 2020 Plan Statement [Table] Statement [Table] Operating Lease, Weighted Average Remaining Lease Term Weighted average remaining lease term (years) Cash Equivalents [Member] Cash Equivalents Entity File Number Entity File Number Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Retained Earnings [Member] Accumulated Deficit Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Net sales exempt from royalty payment. Net Sales Exempt From Royalty Payment Net sales exempt from royalty payment Liabilities, Current [Abstract] Current liabilities: Operating lease expiration month and year. Operating Lease Expiration Month And Year Operating lease expiration month and year Share-based Payment Arrangement [Text Block] Stock-based Compensation Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Operating Lease, Liability Operating lease liabilities Operating Lease, Liability, Total Net lease liability Common Stock [Member] Common Stock Property, Plant and Equipment, Gross Property and equipment, at cost Property, Plant and Equipment, Gross, Total Property, Plant and Equipment, Gross, Beginning Balance Property, Plant and Equipment, Gross, Ending Balance Cover [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Weighted-Average Grant Date Fair Value, Non-vested, Ending Balance Weighted-Average Grant Date Fair Value, Non-vested, Beginning Balance Asset Class [Axis] Asset Class Statement of Stockholders' Equity [Abstract] Property, Plant and Equipment [Table] Schedule Of Property Plant And Equipment [Table] Shares available for future grant under the employee stock purchase plan. Shares Available For Future Grant Under Employee Stock Purchase Plan [Member] Shares available for Future Grant under Employee Stock Purchase Plan Number of Operating Segments Number of operating segments Share-based Payment Arrangement [Abstract] Remaining grant amount. Remaining Grant Amount Remaining grant to be received Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset Document Transition Report Document Transition Report 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, Forfeited/expired Lessee, Operating Lease, Renewal Term Operating lease, additional term of contract Research and Development Expense Research and development Research and Development Expense, Total Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted, Total Share-based Payment Arrangement, Expense Stock-based compensation expense 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 Adjusted Revision of Prior Period, Error Correction, Adjustment [Member] Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Maturities of available-for-sale securities Statement of Financial Position [Abstract] Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected dividend yield RSUs vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Share vested Share Equivalent, Vested Operating Lease, Right-of-Use Asset, Amortization Expense Non-cash lease expense Issuance of common stock under employee stock purchase plan Stock Issued During Period, Value, Employee Stock Ownership Plan Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity: Summary of Immaterial Error Correction Schedule of Error Corrections and Prior Period Adjustments [Table Text Block] Nature of Operations [Text Block] Description of Business 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 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Period Increase (Decrease) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Period Increase (Decrease), Total 2020 Plan reserve increase on January 1, 2022 Long-term Investments Long-term investments Long-term Investments, Total Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted-Average Exercise price per Share, Exercised Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Lessee, Operating Lease, Liability, to be Paid, Year Three 2025 Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Common Stock, Capital Shares Reserved for Future Issuance Reserved shares of common stock for future issuance Measurement Frequency [Axis] Measurement Frequency Award Type [Axis] Award Type Entity Shell Company Entity Shell Company Sale of Stock, Price Per Share Public offering price per share Liabilities and Equity [Abstract] Liabilities and stockholders' equity 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 Proceeds from follow-on public offering, net of underwriters' discounts and commissions and issuance costs, Shares Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Earnings Per Share [Text Block] Net Loss Per Share Attributable to Common Stockholders Amendment Flag Amendment Flag Schedule of Stock by Class [Table] Schedule Of Stock By Class [Table] Product and Service [Axis] Product and Service Commitments and contingencies line items. Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Short-term Investments Short-term investments Short-term Investments, Total Other Nonoperating Income (Expense) Other Nonoperating Income (Expense), Total Other income, net Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Fair value of options vested Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Cash equivalents, Amortized Cost Cash and Cash Equivalents, at Carrying Value, Beginning Balance Cash and Cash Equivalents, at Carrying Value, Ending Balance New Accounting Pronouncements, Policy [Policy Text Block] Recently Adopted Accounting Pronouncements Adopted and Not Yet Adopted Exercise Price Range [Domain] Exercise Price Range Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Unrecognized compensation cost Fair Value, Recurring [Member] Recurring Basis Schedule of cash, cash equivalents and restricted cash. Schedule Of Cash, Cash Equivalents and Restricted Cash [Table Text Block] Schedule of Cash, Cash Equivalents and Restricted Cash Exercise price one. Exercise Price One [Member] Exercise Price $0.16 to 1.35 Antidilutive Securities, Name [Domain] Antidilutive Securities, Name Property, Plant and Equipment [Line Items] Property Plant And Equipment [Line Items] Other Assets, Noncurrent Other long-term assets Other Assets, Noncurrent, Total Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative Geographical [Domain] Geographical Shares available for future grant under the 2020 equity incentive plan. Shares Available For Future Grant Under Two Thousand Twenty Equity Incentive Plan [Member] Shares available for Future Grant under 2020 Equity Incentive Plan Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Aggregate Intrinsic Value, Options exercisable Jawandha V. Athira Pharma Inc. Jawandha V Athira Pharma Inc [Member] Jawandha V. Athira Pharma Inc., Corporate Bond Securities [Member] Corporate Bonds Sale of Stock [Axis] Sale of Stock Fair Value Disclosures [Text Block] Fair Value Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Unrecognized stock-based compensation expense related to non-vested restricted stock units