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Share Based Arrangements To Obtain Goods And Services [Line Items] Plan Name [Axis] Psilera Acquisition [Member] Psilera Acquisition [Member] Psilera Acquisition [Member] Entity Current Reporting Status Minimum licensing transaction for debt conversion. Minimum Licensing Transaction for Debt Conversion Minimum licensing transaction for debt conversion Cash paid for asset acquisition Cash paid for asset acquisition Cash paid for asset acquisition Class of Financing Receivable [Axis] ATAI Variable Interest Entity [Domain] Atai Variable Interest Entity Domain W Fraction [Member]. W Fraction [Member] W Fraction [Member] Agreement type Agreement Type [Domain] Operating Expenses [Abstract] Operating expenses: Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Total deferred tax assets, net Total deferred tax assets, net Deferred Tax Assets, Net of Valuation Allowance Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Common Stock, Shares Authorized Purchase common stock Share-Based Payment Arrangement, Tranche Three [Member] Tranche 3 Innoplexus SPA [Member] Innoplexus SPA. Innoplexus SPA [Member] Finite-Lived Intangible Asset, Expected Amortization, Year Four 2028 Dalriada License Agreement [Member] Dalriada License Agreement [Member] Dalriada License Agreement [Member] Accounts receivable Accounts Receivable, after Allowance for Credit Loss Accounts Receivable, after Allowance for Credit Loss, Total Sale Leaseback Transaction, Gross Proceeds, Financing Activities Aggregate gross proceeds to the Company Investment, Policy [Policy Text Block] Investment Securities Portfolio Product and Service [Axis] Document Fiscal Period Focus Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Debt Instrument, Interest Rate, Stated Percentage Convertible promissory notes, interest rate Interest rate Revenue from Contract with Customer [Abstract] Entity Shell Company Share Based Compensation Arrangements By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Exercise Price. Share Based Compensation Arrangements By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Exercise Price Weighted- Average Exercise Price,Granted Other Accrued Liabilities, Current Other liabilities Shedule Of Equity Method Investment Summarized Statement Of Operations. Shedule Of Equity Method Investment Summarized Statement Of Operations [Line Items] Borrowing amount percentage Borrowing Amount Percentage Borrowing Amount Percentage Investment measured at fair value using fair value option. 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Condition [Domain] Agreement. Agreement [Domain] Recognify Restricted Common Stock Awards [Member] Recognify restricted common stock awards. Recognify Restricted Common Stock Awards [Member] Condensed Financial Information Disclosure [Abstract] Noncontrolling Interests Noncontrolling Interests [Policy Text Block] Noncontrolling Interests. Research and Development Arrangement, Contract to Perform for Others, Type [Axis] process research And development expense process research And development expense process research And development expense Receivable Type [Axis] Convertible debenture units Stock Issued During Period, Shares, Conversion of Units Common Stock, Shares, Issued, Total Common Stock, Shares, Issued Common stock, shares, issued Common stock, shares, issued Asset Class [Domain] Statement [Table] US Internal Revenue Service (IRS) [Member] Royalty Liabilities [Member] Royalty Liabilities [Member] Prime rate percent Prime Rate Percent Prime Rate Percent International International [Member] International [Member] Share-Based Payment Arrangement, Disclosure [Abstract] Noncontrolling Interest [Table] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average grant-date fair value of options granted  Columbia stock purchase agreement [Member] Subsidiary Shares in Connection with the Columbia Stock Purchase Agreement [Member] Subsidiary Shares in Connection with the Columbia Stock Purchase Agreement. Rizafilm LLC License And Supply Agreement [Member] Rizafilm LLC License And Supply Agreement [Member] Rizafilm LLC License And Supply Agreement [Member] Payments to Acquire Businesses, Gross Cash consideration, net of cash acquired Percentage of the funds to be used for research and development purpose. Percentage Of The Funds To Be Used For Research And Development Purpose Percentage of the funds to be used for research and development purpose Twenty Twenty Incentive Plan Twenty Twenty Incentive Plan [Member] Two Thousand And Twenty Incentive Plan [Member] Three To Four Year Service Period [Member] Three To Four Year Service Period [Member] Three To Four Year Service Period [Member] Statement [Line Items] Statement [Line Items] Business Combination [Domain] Service, Other [Member] Warrant [Member] Warrant [Member] Warrant Liability [Member] Entity Filer Category Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Variable Interest Entity Disclosure [Text Block] Variable Interest Entities Payments to Acquire Other Investments Cash paid for other investments Cash paid for investments Annual license fee payable. Annual License Fee Payable Annual license fee payable PsyProtix [Member] PsyProtix [Member] PsyProtix [Member]. Maturity date Loan, Held-for-Sale, Maturity Date Liabilities and Equity Total liabilities and stockholders' equity Debt Instrument [Line Items] Long-Term Debt, Current Maturities, Total Long-Term Debt, Current Maturities Less: current maturities Less: current maturities Interes rate Investment Interest Rate Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted-Average Exercise Price Options exercisable as of September 30, 2025 Restructuring Type [Axis] Long-Lived Tangible Asset [Axis] Notes Receivable [Member] Long term notes receivable Accrued interest payable Accrued interest payable Accrued interest payable, percent Operating Loss Carryforwards [Table] Pre-funded warrants Pre-funded warrants [Member] Pre-funded Warrants Business Combination, Voting Equity Interest Acquired, Percentage Business Acquisition, Percentage of Voting Interests Percentage of voting interest acquired UniQuest, LLC [Member] Uniquest Llc Member Schedule Of Reconciliation Of The Restructuring Charges And Related Payments Restructuring and Related Costs [Table Text Block] Proceeds from debt financing Proceeds from Issuance of Debt DemeRx NB Inc [Member] DemeRx NB Inc. DemeRx NB Inc [Member] Cash and Cash Equivalents, Fair Value Disclosure Money market funds Non-cash impact of stock-based compensation Non-cash impact of stock-based compensation Non Cash Impact Of Stock Based Compensation Non Cash Impact Of Stock Based Compensation Valuation allowance Valuation allowance Deferred Tax Assets, Valuation Allowance Deferred Tax Assets, Valuation Allowance, Total Share price Sale of stock issue price per share Shares Issued, Price Per Share EntheogeniX Biosciences, Inc. [Member] EntheogeniX Biosciences, Inc. [Member] Entheogenix Biosciences Inc. Member Additional Stock Issued During Period, Shares Additional stock issued during period, shares Additional common shares public offering price Documents Incorporated By Reference TextBlock Documents Incorporated by Reference [Text Block] Galaxy NYC Based Multi Strategy Investment Firm [Member] Galaxy NYC based multi strategy investment firm. Third Tranche Third Tranche [Member] Third Tranche [Member] Milestone payments receivable. Milestone Payments Receivable Milestone payments, receivable InnarisBio [Member]. InnarisBio [Member] InnarisBio [Member] Three Month Service Period [Member] Three Month Service Period [Member] Goodwill Goodwill, Ending Balance Goodwill, Beginning Balance Goodwill, Total Goodwill Two to four-year service period. Two to four year service period [Member] Income Taxes Paid Cash paid for taxes Convertible Debt Securities [Member] 2018 short-term convertible promissory notes Net loss attributable to noncontrolling interests - preferred Net income (loss) attributable to noncontrolling interest preferred. Net Income (Loss) Attributable To Noncontrolling Interest Preferred Investment Income, Interest Interest income Proceeds from Convertible Debt Proceeds from conversion of convertible notes to common shares Derivative Liability, Measurement Input Perception Convertible Notes, Measurement Input Share Purchase Deed [Member] Share Purchase Deed (Secondary Sale Shares) [Member] Short Term Convertible Promissory Note Conversion Option Short Term Convertible Promissory Note Conversion Option Short-term convertible promissory note conversion option Geographical [Domain] Payments to Acquire Intangible Assets Cash paid for digital assets Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Other Investments Other Investments [Policy Text Block] Other investments. 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Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Exercisable Weighted Average Exercise Price Weighted- Average Exercise Price,Options exercisable as of September 30, 2025 First Tranche Funding [Member]. First Tranche Funding [Member] First Tranche Funding [Member] License Agreements. License Agreements [Table] Proceeds from Sale of Intangible Assets Proceeds from licensing and collaboration arrangement Share based compensation arrangement by share based payment award equity instruments other than options aggregate intrinsic value granted. Share based Compensation Arrangement By Share based Payment Award Equity Instruments Other Than Options Aggregate Intrinsic Value Granted Aggregate Intrinsic Value,Granted Germany tax losses Federal Tax Loss Carryforward Federal tax loss carryforward. Noncontrolling Interest [Abstract] Debt Instrument, Interest Rate During Period Debt instrument, interest rate other shareholder. 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Performance Based Vesting [Member] Performance Based Vesting [Member] Share-Based Payment Arrangement, Tranche One B [Member] Share-Based Payment Arrangement, Tranche One B [Member] Tranche 1B Short Term Convertible Promissory Notes and Derivative Liability - Related Party Short term convertible promissory notes and derivative Liability - related party. Short-term convertible promissory notes and derivative liability - related party Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Basis and Diluted Net Loss Per Share Attributable to ATAI Stockholders 2018 Convertible Notes Call Option [Member] Two Thousand Eighteen Convertible notes call option. Two Thousand Eighteen Convertible Notes Call Option [Member] Rizafilm [Member] Rizafilm Member Rizafilm [Member] Share Based Compensation Arrangement By Share Based Payment Award EquityI nstruments Other Than Options Outstanding Weighted Average Exercise Price. 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[Member] Atai Kures Inc Member Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Additional Contribution Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Additional Contribution Additional contribution Document Annual Report Document Annual Report Business Combination [Axis] Prepaid Insurance Prepaid insurance Stock Type [Domain] Stock Type Domain IPO [Member] IPO [Member] Derivative, Fair Value, Net Derivative, Fair Value, Net, Total Fair value Business Combination, IPR&D asset Business Combination, IPR&D asset Line of Credit Facility, Decrease Line of Credit Facility, Decrease, Forgiveness Machinery and Equipment [Member] Manufacturing equipment Manufacturing Equipment [Member] Perception december 2020 convertible note agreement [Member]. 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Convertible Notes Receivable [Member] Convertible Notes Receivable [Member] Counterparty Name [Domain] Operating Lease, Weighted Average Remaining Lease Term Operating Lease, Weighted Average Remaining Lease Term Segment Reporting Information [Line Items] Stock Issued During Period, Shares, Restricted Stock Award, Gross Issuance of shares upon restricted stock units vest, shares Warrant, Exercise Price, Increase Warrant exercise price Qualified Financing Transaction [Member] Qualified Financing Transaction [Member] Total lease cost Lease payments Lease, Cost Recognify Life Sciences, Inc. [Member] Recognify Life Sciences Inc. Member License Agreement Terms [Member] License Agreement Terms [Member] Indication [Axis] Indication Axis Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents Crypto Asset, Activity [Table Text Block] Shedule of Activity Related to the Company"s Digital Assets Thereafter Operating Leases Future Minimum Payment Receivable Thereafter Operating Leases Future Minimum Payment Receivable Thereafter Underwriting Discount. Underwriting Discount Underwriting discount Underwriting discount Business Combination, Consideration Transferred, Equity Interest Business Combination, purchase of shares Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net Property and equipment, net Total Loan agreement description Loan Agreement description Loan Agreement description Perception Neuroscience Holdings, Inc. [Member] Perception Neuroscience Holdings Inc. 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Licensing Transaction [Member] Licensing Transaction [Member] Entity Tax Identification Number One Year Service Period [Member] One Year Service Period[Member] One Year Service Period[Member] Fair value of ordinary shares Share Price Estimated market value of the underlying common stock Prepaid Taxes Tax receivables Long-Term Debt, Type [Axis] Prepayment occurs after the second anniversary Prepayment occurs after the second anniversary [Member] Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Proceeds from sale and maturities of securities carried at fair value Contingent Consideration Liability [Policy Text Block] Contingent consideration liability related parties. Contingent Consideration Liabilities Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Notes Receivable Redeemable Noncontrolling Interest [Table Text Block] Schedule of Roll Forward of the Redeemable Noncontrolling Interests Balance Depreciation [Member] Depreciation [Member] Depreciation and Amortization Income Tax Authority, Name [Domain] Noncash or Part Noncash Acquisition, Value of Assets Acquired [Abstract] Assets acquired: Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Change in fair value Proceeds from Issuance or Sale of Equity, Total Proceeds from Issuance or Sale of Equity Proceeds from issuance of equity Local Phone Number Notes Receivable [Table] Notes Receivable Table Psyber, LLC [Member] Psyber Llc Member Other current liabilities Other Liabilities, Current Other Liabilities, Current, Total Contract liabilities Short-term lease cost Short-Term Lease, Cost Supply Agreement [Member] Supply Agreement Member Supply Agreement Restructuring expense Restructuring costs expensed during the period Restructuring Costs Restructuring Costs, Total Common Stock Issuance Costs in Accounts Payable and Accrued Liabilities Common stock issuance costs in accounts payable and accrued liabilities Common stock and pre-funded warrant issuance costs in accounts payable and accrued liabilities Payments of Financing Costs Payments of Financing Costs, Total Cash paid for debt financing costs Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Issuance cost EntheogeniX [Member]. EntheogeniX [Member] EntheogeniX [Member] Accounting Policies [Abstract] Accounting Policies [Abstract] Accelerate license agreement. Accelerate License Agreement [Member] Notes Receivable [Policy Text Block] Notes Receivable Notes Receivable. Previously Reported [Member] Previously Reported [Member] Disaggregation of Revenue [Line Items] Offering costs. Offering Costs Offering costs Apeiron. Apeiron [Member] Apeiron [Member] Change In the Fair Value Of Digital Assets Change In the Fair Value Of Digital Assets Noncash change in the fair value of digital assets Noncash change in the fair value of digital assets, net Class of Stock [Domain] Measurement Input Discount Rate for Royalties on Milestones [Member] Measurement Input Discount Rate for Royalties on Milestones [Member] Measurement Input Discount Rate for Royalties on Milestones [Member] Commercial Paper [Member] Commercial Paper [Member] Labor and Related Expense Labor and Related Expense Cash paid for short term notes receivable - related party Cash paid for short term notes receivable - related party Cash paid for short term notes receivable - related party Weighted- Average Exercise Price, Cancelled or forfeited Share Based Compensation Arrangements By Share Based Payment Award Equity Instruments Other Than Options Cancelled or Forfeited In Period Weighted Average Exercise Price Share based compensation arrangements by share based payment award equity instruments other than options cancelled or forfeited in period weighted average exercise price. Number of options outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Unrecognized stock based compensation compensation, Expected period of recognition Office Equipment [Member] Laboratory and office equipment Accrued Professional Fees, Current Accrued accounting, legal, and other professional fees Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Numerator: Stock, Class of Stock [Table] Entity Emerging Growth Company Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Weighted average period Conversion Price Conversion Price Conversion Price Exclusivity fee, Remaining installment Exclusivity fee, Remaining installment Area of Land Area of Land