100000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 100010 - Statement - Condensed Consolidated Balance Sheets (Unaudited) link:presentationLink link:calculationLink link:definitionLink 100020 - Disclosure - Commitments and Contingencies - Reconciliation of Undiscounted Operating Lease Cash Flows to Operating Lease Liability Payments (Details) 2 link:presentationLink link:calculationLink link:definitionLink 100030 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) link:presentationLink link:calculationLink link:definitionLink 100040 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) link:presentationLink link:calculationLink link:definitionLink 100050 - Statement - Condensed Consolidated Statements of Stockholders' Equity (Unaudited) link:presentationLink link:calculationLink link:definitionLink 995455 - Disclosure - Description of Business link:presentationLink link:calculationLink link:definitionLink 995465 - Disclosure - Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 995475 - Disclosure - Fair Value link:presentationLink link:calculationLink link:definitionLink 995485 - Disclosure - Property and Equipment, Net link:presentationLink link:calculationLink link:definitionLink 995495 - Disclosure - Accrued Liabilities link:presentationLink link:calculationLink link:definitionLink 995505 - Disclosure - Other Income, Net link:presentationLink link:calculationLink link:definitionLink 995515 - Disclosure - Significant Agreements link:presentationLink link:calculationLink link:definitionLink 995525 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 995535 - Disclosure - Common Stock link:presentationLink link:calculationLink link:definitionLink 995545 - Disclosure - Stock-based Compensation link:presentationLink link:calculationLink link:definitionLink 995555 - Disclosure - Net Loss Per Share Attributable to Common Stockholders link:presentationLink link:calculationLink link:definitionLink 995565 - Disclosure - Immaterial Error Correction (Unaudited) link:presentationLink link:calculationLink link:definitionLink 995575 - Disclosure - Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 995585 - Disclosure - Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 995595 - Disclosure - Fair Value (Tables) link:presentationLink link:calculationLink link:definitionLink 995605 - Disclosure - Property and Equipment, Net (Tables) link:presentationLink link:calculationLink link:definitionLink 995615 - Disclosure - Accrued Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 995625 - Disclosure - Other Income, Net (Tables) link:presentationLink link:calculationLink link:definitionLink 995635 - Disclosure - Commitments and Contingencies (Tables) link:presentationLink link:calculationLink link:definitionLink 995645 - Disclosure - Common Stock (Tables) link:presentationLink link:calculationLink link:definitionLink 995655 - Disclosure - Stock-based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 995665 - Disclosure - Net Loss Per Share Attributable to Common Stockholders (Tables) link:presentationLink link:calculationLink link:definitionLink 995675 - Disclosure - Immaterial Error Correction (Unaudited) (Tables) link:presentationLink link:calculationLink link:definitionLink 995685 - Disclosure - Description of Business - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995695 - Disclosure - Significant Accounting Policies - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995705 - Disclosure - Significant Accounting Policies - Schedule of Cash, Cash Equivalents and Restricted Cash (Details) link:presentationLink link:calculationLink link:definitionLink 995715 - Disclosure - Fair Value - Schedule of Fair Value of Cash Equivalents and Short-term Investments (Details) link:presentationLink link:calculationLink link:definitionLink 995725 - Disclosure - Fair Value - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995735 - Disclosure - Property and Equipment, Net - Schedule of Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 995745 - Disclosure - Property and Equipment, Net - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995755 - Disclosure - Accrued Liabilities - Schedule of Accrued Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 995765 - Disclosure - Other Income, Net - Schedule of Other Income, Net (Details) link:presentationLink link:calculationLink link:definitionLink 995775 - Disclosure - Significant Agreements - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995785 - Disclosure - Commitments and Contingencies - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995795 - Disclosure - Commitments and Contingencies - Reconciliation of Undiscounted Operating Lease Cash Flows to Operating Lease Liability Payments (Details) link:presentationLink link:calculationLink link:definitionLink 995805 - Disclosure - Commitments and Contingencies - Weighted Average Remaining Lease Term and Weighted Average Discount Rate to Determine the Operating Lease Liability (Details) link:presentationLink link:calculationLink link:definitionLink 995815 - Disclosure - Commitments and Contingencies - Operating Lease Expense and Variable Lease Expense (Details) link:presentationLink link:calculationLink link:definitionLink 995825 - Disclosure - Common Stock - Schedule of Reserved Shares of Common Stock for Future Issuance (Details) link:presentationLink link:calculationLink link:definitionLink 995835 - Disclosure - Common Stock - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995845 - Disclosure - Stock-based Compensation - Stock-based Compensation Expense Recognized (Details) link:presentationLink link:calculationLink link:definitionLink 995855 - Disclosure - Stock-based Compensation - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995865 - Disclosure - Stock-based Compensation - Weighted-Average Assumptions used in Estimating Fair Value of each Stock Options using Black-Scholes Option-Pricing Model (Details) link:presentationLink link:calculationLink link:definitionLink 995875 - Disclosure - Stock-based Compensation - Summary of Option Activity Changes in Shares Available for Grant under the 2020 Plan and the 2024 Inducement Plan (Details) link:presentationLink link:calculationLink link:definitionLink 995885 - Disclosure - Stock-based Compensation - Summary of Option Activity under the 2020 Plan and the 2024 Inducement Plan (Details) link:presentationLink link:calculationLink link:definitionLink 995895 - Disclosure - Stock-based Compensation - Summary of Stock Options Outstanding and Exercisable under the 2020 Plan and the 2024 Inducement Plan (Details) link:presentationLink link:calculationLink link:definitionLink 995905 - Disclosure - Stock-based Compensation - Summary of Restricted Stock Activity (Details) link:presentationLink link:calculationLink link:definitionLink 995915 - Disclosure - Net Loss Per Share Attributable to Common Stockholders - Summary of Dilutive Securities excluded from Computation of Diluted Net Loss Per Share Attributable to Common Stockholders (Details) link:presentationLink link:calculationLink link:definitionLink 995925 - Disclosure - Immaterial Error Correction (Unaudited) - Summary of Immaterial Errors Correction in the Weighted-Average Number of Common Shares Outstanding (Details) link:presentationLink link:calculationLink link:definitionLink Statement [Line Items] Statement [Line Items] Plan Name Plan Name [Domain] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Number of operating segments Number of Operating Segments Stock Issued During Period, Shares, Employee Stock Ownership Plan Issuance of common stock under employee stock purchase plan, shares Weighted-Average Exercise price per Share, Options exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Beginning balance, shares Ending balance, shares Shares, Outstanding Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Axis] Level 2 Fair Value, Inputs, Level 2 [Member] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Error Corrections and Prior Period Adjustments Restatement [Line Items] Remaining 2024 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Schedule Of Stock By Class [Table] Stock, Class of Stock [Table] Product and Service Product and Service [Axis] Collaborative Arrangement and Arrangement Other than Collaborative Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Short-term Investments Short-Term Investment [Member] Short-Term Investment [Member] Name of plaintiff Loss Contingency, Name of Plaintiff Common Stock Equity [Text Block] Sale of Stock Sale of Stock [Domain] Cash and Cash Equivalents [Domain] Exercise Price $20.55 to 29.41 Exercise Price Three [Member] Exercise price three. Entity Central Index Key Entity Central Index Key Entity reincorporation, date of reincorporation Entity Reincorporation Date Of Reincorporation Entity reincorporation, date of reincorporation. Common Stock, Shares, Issued, Total Common stock, shares issued Common Stock, Shares, Issued Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Entity Address, State or Province Entity Address, State or Province Revision of Prior Period [Axis] Investments and Cash, Total Investments and Cash Cash, cash equivalents, and investments Accounting Standards Update [Extensible Enumeration] Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Aggregate Intrinsic Value, Options exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Cover [Abstract] Net loss per share attributable to common stockholders, basic Net loss per share, basic Earnings Per Share, Basic, Total Earnings Per Share, Basic Schedule Of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range [Table] Share-Based Payment Arrangement, Option, Exercise Price Range [Table] Prior Period Adjustment [Abstract] Investments, Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax 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. Operating expenses: Operating Expenses [Abstract] Bothell, Washington Bothell Washington [Member] Bothell, Washington. Stock-based compensation expense Share-Based Payment Arrangement, Expense Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Total Accumulated deficit Retained Earnings (Accumulated Deficit) Plan Name Plan Name [Axis] Shares Outstanding Shares, Beginning Balance Shares, Ending Balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Current assets: Assets, Current [Abstract] Reserved shares of common stock for future issuance Common Stock, Capital Shares Reserved for Future Issuance Wang V. Athira Pharma Inc., Wang V Athira Pharma Inc [Member] Wang V. Athira Pharma, Inc. Weighted-Average Grant Date Fair Value, Non-vested, Cancelled Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Amendment Description Product and Service Product and Service [Domain] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated Other Comprehensive Income (Loss), Net of Tax Operating lease initial term Lessee, Operating Lease, Term of Contract Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net Recurring Basis Fair Value, Recurring [Member] Other Income and Expenses [Abstract] Common stock, par value Common Stock, Par or Stated Value Per Share Antidilutive Securities, Name Antidilutive Securities, Name [Domain] Payments for Legal Settlements Legal settlement amount Revision of Prior Period, Error Correction, Adjustment [Member] Adjusted Royalty obligation Royalty Obligation Royalty obligation. Equity Components Equity Components [Axis] Stock Options to Purchase Common Stock Stock Options To Purchase Common Stock [Member] Stock options to purchase common stock. Entity Address, Address Line One Entity Address, Address Line One Employee-related Liabilities, Current, Total Employee compensation and benefits Employee-related Liabilities, Current Issuance of common stock upon exercise of common stock options and vesting of restricted stock units, 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 unit shares. Share Equivalent, Granted Granted, shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Property Plant And Equipment [Line Items] Property, Plant and Equipment [Line Items] Total other income, net Nonoperating Income (Expense) 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 [Table Text Block] Risk-free interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share Equivalent, Non-vested, Beginning Balance Share Equivalent, Non-vested, Ending Balance Phase 3 Clinical Trial Initiation Phase Three Clinical Trail Initiation Of License Agreement [Member] Phase three clinical trail initiation of license agreement. Amendment Flag Amendment Flag Operating lease liability, less current portion Operating Lease, Liability, Noncurrent Additional Paid in Capital, Common Stock, Ending Balance Additional Paid in Capital, Common Stock, Beginning Balance Additional paid-in capital Additional Paid in Capital, Common Stock Investments, Fair Value Debt Securities, Available-for-Sale, Noncurrent Net loss Net loss Shares, Exercised Issuance of common stock upon exercise of common stock options, shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Shares Exercisable Shares, Options exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Research and Development Research and Development Expense [Member] Equity Component Equity Component [Domain] Statistical Measurement Statistical Measurement [Domain] General and Administrative Expense, Total General and administrative General and Administrative Expense Unrealized gain on available-for-sale securities Unrealized (loss) gain on available-for-sale securities Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent, Total Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Other income, net Other Nonoperating Income (Expense), Total Other Nonoperating Income (Expense) Athira Pharma Inc V Dr. Kawas. Athira Pharma Inc V Dr. Kawas [Member] Athira Pharma Inc V Dr. Kawas Payables and Accruals [Abstract] Restricted Cash, Current Restricted cash, current Employee Stock Purchase Plan Member Employee Stock Purchase Plan Employee Stock Purchase Plan [Member] Short-term Investments, Total Short-term investments Short-Term Investments Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block] Summary of Stock Options Outstanding and Exercisable under the 2020 Plan and the 2024 Inducement Plan Operating lease expense Operating Lease, Expense Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Restricted Cash, Noncurrent Restricted cash, non-current Collaborative Arrangement and Arrangement Other than Collaborative Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Significant Agreements Collaborative Arrangement Disclosure [Text Block] Comprehensive loss attributable to common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding, Beginning Balance Common stock, shares outstanding Common Stock, Shares, Outstanding Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Antidilutive Securities Antidilutive Securities [Axis] Corporate Bonds Corporate Bond Securities [Member] Fair value of options granted 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 Entity Interactive Data Current Entity Interactive Data Current Document Quarterly Report Document Quarterly Report 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 Statistical Measurement Statistical Measurement [Axis] Proceeds from follow-on public offering, net of underwriters' discounts and commissions and issuance costs 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. Operating lease expense Operating Lease, Cost Professional services and other Accrued Professional Services And Other Current Accrued professional services and other, current. Reconciliation of Undiscounted Operating Lease Cash Flows to Operating Lease Liability Payments Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Commercial Paper Commercial Paper [Member] Summary of Restricted Stock Activity Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Shares Available for Grant, Ending Balance Shares Available for Grant, Beginning Balance Shares available for grant Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant 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 Remaining weighted-average period expected to recognize unrecognized compensation cost Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Interest and Other Income, Total Interest and other income Interest and Other Income Research and Development Expenses Research and Development Expense, Policy [Policy Text Block] Income Statement Location Statement of Income Location, Balance [Axis] Cash and Cash Equivalents [Axis] Total assets Assets Expected term (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Share Equivalent, Vested Share vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period RSUs vested Annual minimum royalty payments Annual Minimum Royalty Payments After First Commercial Sale Annual minimum royalty payments after first commercial sale. New Accounting Pronouncements, Policy [Policy Text Block] Recently Adopted Accounting Pronouncements Entity Address, City or Town Entity Address, City or Town Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Equity [Abstract] Share Equivalent, Cancelled Cancelled Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Grant income Grant Income Grant income. Cash used in operations Net Cash Provided by (Used in) Continuing Operations Net Cash Provided by (Used in) Continuing Operations, Total Short-term investments effective maturity date Short Term Investments Maturity Term Short-term investments maturity term. Depreciation, Total Depreciation expense Depreciation Aggregate offering price Aggregate Offering Price Aggregate offering price. Revision of Prior Period [Domain] National Institutes of Health Grant National Institutes Of Health Grant [Member] National institutes of health grant member. 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. Stock-based Compensation Share-Based Payment Arrangement [Text Block] Construction in Progress Construction in Progress [Member] Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Fair Value Disclosures [Abstract] 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 Research and development expenses Accrued Research And Development Expenses Current Accrued research and development expenses, current. Issuance of common stock upon exercise of common stock options Stock Issued During Period, Value, Stock Options Exercised Current liabilities: Liabilities, Current [Abstract] Issuance of common stock upon vesting of restricted stock units, shares Issuance of Common Stock Upon Vesting of Restricted Stock Units, Shares Issuance of common stock upon vesting of restricted stock units, shares. Description Of Business [Line Items] Description Of Business [Line Items] Description of business. Document Type Document Type U.S. Government Debt and Agency Securities US Government Agencies Debt Securities [Member] Security12b Title Title of 12(b) Security Cash and Cash Equivalents, at Carrying Value, Ending Balance Cash and Cash Equivalents, at Carrying Value, Beginning Balance Cash equivalents, Amortized Cost Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Lease, Cost [Table Text Block] Weighted Average Remaining Lease Term and Weighted Average Discount Rate and Operating Lease Expense and Variable Lease Expense Statement of Stockholders' Equity [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Aggregate intrinsic value of options exercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Research and Development Expense, Total Research and development Research and Development Expense Options, granted Shares, Granted Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Asset Class Asset Class [Domain] Property, Plant and Equipment, Gross, Ending Balance Property, Plant and Equipment, Gross, Beginning Balance Property, Plant and Equipment, Gross, Total Property and equipment, at cost Property, Plant and Equipment, Gross Insurance recovery in operating expenses Insurance Recoveries Leases Lessee, Leases [Policy Text Block] 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] Shares Available for Future Grant under 2024 Inducement Equity Incentive Plan Shares Available For Future Grant Under Two Thousand Twenty Four Inducement Equity Incentive Plan [Member] Shares available for future grant under two thousand twenty four inducement equity incentive plan. Milestone payments on development milestone achieved Payment On Achievement Of Development Milestone Payment on achievement of development milestone. Lab Equipment Laboratory Equipment [Member] Laboratory equipment. Error Correction [Table] Office Furniture, Fixtures, and Computer Equipment Furniture Fixtures And Computer Equipment [Member] Furniture, fixtures and computer equipment. Financial Instruments [Domain] Description Of Business [Table] Description Of Business [Table] Description of business. Deposit of final settlement payment to settlement fund account. Deposit of Final Settlement Payment To Settlement Fund Account Deposit of final settlement payment to settlement fund account 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. Sale of Stock Sale of Stock [Axis] Statement of Comprehensive Income [Abstract] Milestone payments payable upon marketing approval Milestone Payments Amount Payable Upon Marketing Approval Milestone payments amount payable upon marketing approval. Options and restricted stock units forfeited, cancelled, or expired Share-based Compensation Arrangement by Share-based Payment Award, Options and Restricted Stock Units, Forfeited, Cancelled or Expired Share-based compensation arrangement by share-based payment award, options and restricted stock units, forfeited, cancelled or expired. Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Period Increase (Decrease), Total Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Period Increase (Decrease) Shares reserved Thereafter Lessee Operating Lease Liability Payments Due After Year Two Lessee operating lease liability payments due after year two. Entity Address, Address Line Two Entity Address, Address Line Two Litigation Case Litigation Case [Domain] Liabilities and stockholders' equity Liabilities and Equity [Abstract] Document Period End Date Document Period End Date 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 APIC, Share-based Payment Arrangement, Increase for Cost Recognition, Total Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Total accrued Liabilities Accrued liabilities Accrued Liabilities, Current Other Nonoperating Expense, Total Other Nonoperating Expense Other expense Emerging Growth Company Status Emerging Growth Company Status Policy [Text Block] Emerging growth company status. Trading Symbol Trading Symbol Total stockholders' equity Beginning balance Ending balance Equity, Attributable to Parent Exercise Price Two [Member] Exercise price two. Exercise Price $8.93 to 19.94 2020 Employee Stock Purchase Plan Tow Thousand And Twenty Employee Stock Purchase Plan [Member] Tow thousand and twenty employee stock purchase plan. Long-Lived Tangible Asset Long-Lived Tangible Asset [Axis] Stock-based Compensation Share-Based Payment Arrangement [Policy Text Block] Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Variable lease expense Variable Lease, Cost Schedule Of Property Plant And Equipment [Table] Property, Plant and Equipment [Table] Change in Accounting Principle, Accounting Standards Update, Adopted [true false] Change in accounting principle, accounting standards update, adopted Selling, General and Administrative Expenses, Policy [Policy Text Block] General and Administrative Expenses Stock-based Compensation Expense Recognized Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Description of Business Nature of Operations [Text Block] Insurance recovery receivable related to legal settlement (Note 7) Insurance recovery receivable Insurance Settlements Receivable, Current Geographical Geographical [Axis] Investments, Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Unrecognized compensation cost Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount 2020 Equity Incentive Plan Two Thousand And Twenty Equity Incentive Plan [Member] Two thousand and twenty equity incentive plan. Use of Estimates Use of Estimates, Policy [Policy Text Block] Phase 2 Clinical Trial Initiation Phase Two Clinical Trail Initiation Of License Agreement [Member] Phase two clinical trail initiation of license agreement. Exercise Price Range Exercise Price Range [Domain] Class Of Stock [Line Items] Class of Stock [Line Items] Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items] Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items] Expected dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Security Exchange Name Security Exchange Name Long-Lived Tangible Asset Long-Lived Tangible Asset [Domain] 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 Less: accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Fair Value Fair Value Disclosures [Text Block] Research and Development Arrangement, Contract to Perform for Others, Type Research and Development Arrangement, Contract to Perform for Others, Type [Domain] 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. Error Correction [Text Block] Immaterial Error Correction (Unaudited) Maximum Maximum [Member] Maximum [Member] Total liabilities and stockholders' equity Liabilities and Equity Operating lease right-of-use asset Operating Lease, Right-of-Use Asset Net loss per share, diluted Net loss per share attributable to common stockholders, diluted Earnings Per Share, Diluted, Total Earnings Per Share, Diluted Leasehold Improvement Leasehold Improvements [Member] Entity Ex Transition Period Entity Ex Transition Period Total liabilities Liabilities Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Domain] Total current assets Assets, Current Agency Securities [Member] Agency Securities Commitment And Contingencies [Table] Commitment And Contingencies [Table] Commitment and contingencies. Number of shares issued and sold Stock Issued During Period, Shares, New Issues Operating lease existence of option to extend Lessee, Operating Lease, Existence of Option to Extend [true false] Entity Filer Category Entity Filer Category Property, Plant and Equipment [Abstract] Current Fiscal Year End Date Current Fiscal Year End Date Fair value of options vested Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value Present value adjustment for minimum lease commitments Lessee, Operating Lease, Liability, Undiscounted Excess Amount Aggregate Intrinsic Value, Outstanding Balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Entity Registrant Name Entity Registrant Name Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Net Loss Per Share Attributable to Common Stockholders Earnings Per Share [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Money Market Fund Money Market Funds [Member] Weighted-average shares used in computing net loss per share attributable to common stockholders, basic Weighted average shares outstanding,basic Weighted Average Number of Shares Outstanding, Basic, Total Weighted Average Number of Shares Outstanding, Basic Litigation Case Litigation Case [Axis] Common stock, shares authorized Common Stock, Shares Authorized Laboratory and Office Facilities Laboratory And Office Facilities [Member] Laboratory and office facilities. Level 1 Fair Value, Inputs, Level 1 [Member] 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, Granted Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercise Price Range Exercise Price Range [Axis] Licensed Products Licensed Products [Member] Licensed Products. Financial Instrument [Axis] Weighted-Average Remaining Contractual Term (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Net Loss Per Share Attributable to Common Stockholders Earnings Per Share, Policy [Policy Text Block] General and Administrative General and Administrative Expense [Member] Share-Based Payment Arrangement [Abstract] Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] Collaborative Arrangement and Arrangement Other than Collaborative [Table] Unaudited Interim Condensed Financial Statements Unaudited Interim Condensed Financial Statements Policy [Text Block] Unaudited interim condensed financial statements. Accounting Policies [Abstract] Share-Based Payment Arrangement, Option, Activity [Table Text Block] Summary of Option Activity under the 2020 Plan and the 2024 Inducement Plan 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. Fair value of restricted stock units granted Share-based Compensation Arrangement by Share-based Payment Award, Other Than Options Grant Date Fair Value Share-based compensation arrangement by share-based payment award, other than options grant date fair value Stockholders' equity: Equity, Attributable to Parent [Abstract] Litigation Settlement, Fee Expense Legal settlement expense Slyne V. Athira Pharma Inc., Slyne V Athira Pharma Inc [Member] Slyne V. Athira Pharma Inc. Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Statement [Table] Statement [Table] Segments Segment Reporting, Policy [Policy Text Block] Schedule of Property and Equipment Property, Plant and Equipment [Table Text Block] Cash equivalents, Unrealized Gains Cash And Cash Equivalents Accumulated Gross Unrealized Gain Before Tax Cash and cash equivalents accumulated gross unrealized gain before tax. Weighted-Average Remaining Contractual Term, Expected to vest (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Entity File Number Entity File Number Earnings Per Share [Abstract] Cash Equivalents Cash Equivalents [Member] Statement of Financial Position [Abstract] Entity incorporation, date of Incorporation Entity Incorporation, Date of Incorporation Loss from operations Loss from operations Operating Income (Loss) Expected volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Entity Shell Company Entity Shell Company Stock Issued During Period, Value, Employee Stock Ownership Plan Issuance of common stock under employee stock purchase plan Entity Tax Identification Number Entity Tax Identification Number Assets Assets [Abstract] Schedule of Error Corrections and Prior Period Adjustments [Table Text Block] Summary of Immaterial Error Correction Entity Current Reporting Status Entity Current Reporting Status 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 Exercise Price ($) Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Share based compensation shares authorized under stock option plans exercise price. Property and Equipment, Net Property, Plant and Equipment Disclosure [Text Block] Non-vested Restricted Stock Awards Unvested restricted stock awards. Unvested Restricted Stock Awards [Member] Unvested RSAs Previously Reported [Member] As Reported Geographical Geographical [Domain] Document Fiscal Year Focus Document Fiscal Year Focus Unbilled grant receivable Unbilled Grant Receivable Current Unbilled grant receivable current. Change in Accounting Principle, Accounting Standards Update, Adoption Date Change in accounting principle, accounting standards update, adoption date Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Total Shares, Forfeited/expired Options forfeited, cancelled, or expired Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period Cash equivalents, Unrealized Losses Cash And Cash Equivalents Accumulated Gross Unrealized Loss Before Tax Cash and cash equivalents accumulated gross unrealized loss before tax. Milestone payments, amount payable Milestone Payments Amount Payable Upon Trial Initiation Milestone payments amount payable upon trial initiation. Cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Cash, cash equivalents and restricted cash, beginning of period Cash, cash equivalents and restricted cash, end of period Long-term Investments, Total Long-term investments Long-Term Investments City Area Code City Area Code Total current liabilities Liabilities, Current Washington State University License Agreement Washington State University License Agreement [Member] Washington state university license agreement. Non-vested Restricted Stock Units Non Vested Restricted Stock Units [Member] Non-vested restricted stock units member. Organization, Consolidation and Presentation of Financial Statements [Abstract] Local Phone Number Local Phone Number Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Loss Contingency, Lawsuit Filing Date Lawsuit filing date Schedule Of Share Based Compensation Arrangement Shares Available For Grant Table [Text Block] Schedule of share based compensation arrangement shares available for grant. Summary of Option Activity Changes in Shares Available for Grant under the 2020 Plan and the 2024 Inducement Plan Commitments and Contingencies Disclosure [Abstract] Fair Value By Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Investments, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost Current operating lease liability Operating Lease, Liability, Current Net sales exempt from royalty payment Net Sales Exempt From Royalty Payment Net sales exempt from royalty payment. Operating lease expiration month and year Operating Lease Expiration Month And Year Operating lease expiration month and year. Accumulated Deficit Retained Earnings [Member] Schedule of Other Income, Net Schedule of Other Nonoperating Income (Expense) [Table Text Block] Document Transition Report Document Transition Report 2026 Lessee, Operating Lease, Liability, to be Paid, Year Two Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Weighted-Average Exercise price per Share, Exercised Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Minimum Minimum [Member] Minimum [Member] Common Stock Common Stock [Member] 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. Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] 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 Loss Contingency, Accrual, Current Accrued legal settlement 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 Additional Paid-In Capital Additional Paid-in Capital [Member] Debt Securities, Available-for-sale, Current, Total Investments, Fair Value Debt Securities, Available-for-Sale, Current 2024 Inducement Equity Incentive Plan Two Thousand And Twenty Four Inducement Equity Incentive Plan [Member] Two thousand and twenty four inducement equity incentive plan. Income Statement Location Statement of Income Location, Balance [Domain] 2025 Lessee, Operating Lease, Liability, to be Paid, Year One Other Assets, Noncurrent, Total Other long-term assets Other Assets, Noncurrent Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding 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. Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Total Common Stock, Value, Issued Common stock, $0.0001 par value; 900,000,000 shares authorized at June 30, 2024 and December 31, 2023, respectively; 38,439,375 and 38,172,603 shares issued and outstanding at June 30, 2024 and December 31, 2023, respectively Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Cash equivalents, Fair Value Cash and Cash Equivalents, Fair Value Disclosure Schedule of Fair Value of Cash Equivalents and Short-term Investments Fair Value, Assets Measured on Recurring Basis [Table Text Block] Net lease liability Operating Lease, Liability, Total Operating lease liabilities Operating Lease, Liability 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. Measurement Frequency Measurement Frequency [Axis] Schedule of Accrued Liabilities Schedule of Accrued Liabilities [Table Text Block] Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted Weighted average shares outstanding, diluted Weighted Average Number of Shares Outstanding, Diluted, Total Weighted Average Number of Shares Outstanding, Diluted Significant Accounting Policies Significant Accounting Policies [Text Block] Research and Development Arrangement, Contract to Perform for Others, Type Research and Development Arrangement, Contract to Perform for Others, Type [Axis] Operating lease, additional term of contract Lessee, Operating Lease, Renewal Term Shares, Expected to vest Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Total undiscounted lease payments Lessee, Operating Lease, Liability, to be Paid Entity Small Business Entity Small Business At The Market Offering. At The Market Offering [Member] At The Market Common Stock Offering Sales Revenues Revenues, Total Proceeds from follow-on public offering, net of underwriters' discounts and commissions and issuance costs, Shares 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. Short-term Investments Short-term Investments, Policy [Policy Text Block] Short-term investments. Other Income, Net Other Nonoperating Income and Expense [Text Block] Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments and contingencies line items. 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 Accrued Liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Loss Contingency, Name of Defendant Name of defendant Asset Class Asset Class [Axis] Measurement Frequency Measurement Frequency [Domain] 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. Weighted average remaining lease term (years) Operating Lease, Weighted Average Remaining Lease Term Exercise Price $0.16 to 4.22 Exercise Price One [Member] Exercise price one. Accounts Payable, Current, Total Accounts payable Accounts Payable, Current Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] Total operating expenses Costs and Expenses 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. Jawandha V. Athira Pharma Inc., Jawandha V Athira Pharma Inc [Member] Jawandha V. Athira Pharma Inc.