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Commitment, Period for Minimum Amount Required Fair Value as of Grant Date Award Grant Date Fair Value Schedule of Securities in an Unrealized Loss Position Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Aggregate intrinsic value, Exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Subsequent Event [Line Items] Subsequent Event [Line Items] Payments of liabilities related to future royalties and milestones, net Revenue share payments Payments For Royalties And Milestones Payments For Royalties And Milestones Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Shares vested but not issued (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option 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Depletion, and Amortization Assets under construction Asset under Construction [Member] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Finite-lived intangible asset, expected amortization, year four Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Four Accretion of available-for-sale securities Debt Securities, Available For Sale, Accretion Debt Securities, Available For Sale, Accretion Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Significant Accounting Policies Executive Category: Executive Category [Axis] Consumables Inventory, Supplies, Net of Reserves Going Concern Going Concern, Policy [Policy Text Block] Going Concern, Policy Stock options vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Expired (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period Counterparty Name [Axis] Counterparty Name [Axis] Furniture and fixtures Furniture and Fixtures [Member] Liabilities and shareholders’ equity Liabilities and Equity [Abstract] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Weighted-Average Remaining Contractual Term, Exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted-Average Remaining Contractual Term Inventories, net Total inventories, net Inventory, Net Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] 2026 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Fair Value Measurements Fair Value Disclosures [Text Block] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Unaudited supplemental cash flow information Other information Supplemental Cash Flow Information [Abstract] Finite-lived intangible asset, expected amortization, year one Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year One Liabilities related to future royalties and milestones, net - non-current Royalty And Milestone Liability, Noncurrent Royalty And Milestone Liability, Noncurrent Ownership percentage by noncontrolling owners (more than) Subsidiary, Ownership Percentage, Noncontrolling Owner PEO Name PEO Name Leasehold improvements Leasehold Improvements [Member] Other segment income (expenses), net Segment Reporting, Other Segment Item, Amount Property, Plant and Equipment, Type [Axis] Long-Lived Asset, Class [Axis] Additional borrowing capacity for six months after closing Line of Credit Facility, Additional Borrowing Capacity, Initial Line of Credit Facility, Additional Borrowing Capacity, Initial Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Interest expense accrued on liabilities related to future royalties and milestones, net Collaboration Agreement, Non-Cash Interest Expense And Cumulative Catch-Up Adjustment Collaboration Agreement, Non-Cash Interest Expense And Cumulative Catch-Up Adjustment Entity Tax Identification Number Entity Tax Identification Number Vesting of restricted stock unit awards net of shares withheld to cover tax withholding (in shares) Restricted Stock, Shares Issued Net of Shares for Tax Withholdings Liabilities Related to Future Royalties and Milestones, Net Liability Related To Sales Of Future Revenue, Net [Text Block] Liability Related To Sales Of Future Revenue, Net Severance and termination-related costs paid Payments for Restructuring Exercised (in usd per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Cash, cash equivalents and restricted cash, beginning of period Cash, cash equivalents and restricted cash, end of period Total cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Schedule of Finite-Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Professional fees Accrued Professional Fees, Current (Decrease) increase in accounts payable Increase (Decrease) in Accounts Payable Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Debt Instrument [Axis] Debt Instrument [Axis] Subsequent Event [Table] Subsequent Event [Table] Finite-lived intangible asset, expected amortization, year two Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two Total lease costs Lease, Cost Schedule of Inventories, Net Schedule of Inventory, Current [Table Text Block] Leases Lessee, Operating Leases [Text Block] Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic net loss per ordinary share (in usd per share) Basic net loss per ordinary share (in usd per share) Earnings Per Share, Basic Licensed IP rights Intellectual Property [Member] Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Short term lease costs Short-Term Lease, Cost Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Accumulated deficit Accumulated deficit Retained Earnings (Accumulated Deficit) Restructuring and Related Activities [Abstract] Product and Service [Axis] Product and Service [Axis] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Shares Common Stock [Member] Assets classified as marketable securities: available-for-sale debt securities Aggregate estimated fair value Debt Securities, Available-for-Sale Operating lease costs Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Percentage reduction in the workforce Restructuring and Related Cost, Number of Positions Eliminated, Period Percent Research and development costs Accrued Research And Development Cost, Current Accrued Research And Development Cost, Current Schedule of Carrying Value and Current Versus Non-Current Split Liability Related To Future Royalties and Milestones [Table Text Block] Liability Related To Future Royalties and Milestones Liabilities related to future royalties and milestones, net Royalty And Milestone Liability [Abstract] Royalty And Milestone Liability Unconditional purchase obligation expected to be incurred within on year Unrecorded Unconditional Purchase Obligation, Due in Next Rolling 12 Months Equity Awards Adjustments Equity Awards Adjustments [Member] Deferred Class B Shares Deferred B Shares Deferred Class B Shares [Member] Deferred Class B Shares [Member] Contractual Maturity [Domain] Contractual Maturity [Domain] Contractual Maturity [Domain] Total liabilities and shareholders’ equity Liabilities and Equity Variable costs Variable Lease, Cost Outstanding share options Share Options Share-Based Payment Arrangement, Option [Member] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Number of ordinary shares equivalent to each ADS Number of Common Shares per American Depositary Share Number of Common Shares per American Depositary Share Costs related to the realignment Severance and termination-related costs incurred Restructuring Charges Plan Name [Axis] Plan Name [Axis] No Trading Symbol Flag No Trading Symbol Flag Inventory Disclosure [Abstract] Tabular List, Table Tabular List [Table Text Block] Vesting [Axis] Vesting [Axis] Additional paid-in capital Additional Paid in Capital License milestone payment Payments to Acquire Intangible Assets Other income, net Other income, net Other Nonoperating Income (Expense) Finite-lived intangible asset, expected amortization, year five Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Five Finite-lived intangible asset, expected amortization, year three Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three Name Awards Close in Time to MNPI Disclosures, Individual Name Entity Address, Country Entity Address, Country Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Aggregate intrinsic value, Options outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Non-current assets: Assets, Noncurrent [Abstract] Property, Plant and Equipment, Type [Domain] Long-Lived Asset, Class [Domain] Autolus Autolus [Member] Autolus Capitalized implementation costs included in accounts payable and accrued expenses Hosting Arrangement, Service Contract, Implementation Cost, Capitalized, after Accumulated Amortization, Current and Noncurrent Hosting Arrangement, Service Contract, Implementation Cost, Capitalized, after Accumulated Amortization, Current and Noncurrent Rebates Rebates [Member] Rebates Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Accrued interest income Accrued Interest Income, Current Accrued Interest Income, Current Adjustment to Compensation: Adjustment to Compensation [Axis] Total intrinsic value of share options exercised (less than) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value, Rounding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value, Rounding Class of Stock [Domain] Class of Stock [Domain] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Voting rights, votes per share Common Stock, Voting Rights, Votes Per Share Common Stock, Voting Rights, Votes Per Share Workforce Reduction Costs Restructuring and Related Activities Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total assets Assets, Fair Value Disclosure Vested and expected to vest (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Name Measure Name Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Reduction in the value of the tax credit obtained (as percent) SME Benefit Threshold, Reduction In The Value Of The Tax Credit Obtained SME Benefit Threshold, Reduction In The Value Of The Tax Credit Obtained Number of securities held Number of securities held in a continuous unrealized loss position Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional Paid in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Fair market value of investments in an unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position Lab equipment Equipment [Member] Liability related to future royalties and milestones, aggregated cumulative catch-up adjustment Royalty And Milestone Liability, Accrued Cumulative Catch-Up Adjustment Royalty And Milestone Liability, Accrued Cumulative Catch-Up Adjustment Name Trading Arrangement, Individual Name Unrecognized share-based compensation expense related to share-based awards Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Cash and cash equivalents Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Raw materials Inventory, Raw Materials, Net of Reserves Contractual Maturity [Axis] Contractual Maturity [Axis] Contractual Maturity Company Selected Measure Amount Company Selected Measure Amount Investments, Debt and Equity Securities [Abstract] Depreciation on property and equipment Depreciation, Depletion and Amortization Weighted-Average Remaining Contractual Term, Vested and expected to vest Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Entity Address, Address Line Two Entity Address, Address Line Two Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Current assets: Assets, Current [Abstract] Weighted-average remaining lease term - operating leases Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Foreign Currency Translation Foreign Currency Transactions and Translations Policy [Policy Text Block] Entity Address, Address Line One Entity Address, Address Line One Leased assets obtained in exchange for operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Vested (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Income tax expense Income tax expenses Income Tax Expense (Benefit) Foreign exchange gains (losses), net Foreign exchange gains (losses) Foreign exchange gains (losses), net Gain (Loss), Foreign Currency Transaction, before Tax Proceeds from research and development tax credit Proceeds from Research and Development Tax Credit Proceeds from Research and Development Tax Credit Cost of sales Cost of sales Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Net increase (decrease) in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Net loss Net loss Net loss Net losses Net Income (Loss) Attributable to Parent Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Tranche Two Share-Based Payment Arrangement, Tranche Two [Member] Restatement Determination Date: Restatement Determination Date [Axis] Shares that may be purchased by the warrant (in shares) Class of Warrant or Right, Number of Securities Called by Each Warrant or Right Proceeds from the exercise of share options Proceeds from Stock Options Exercised Interest income Interest income Investment Income, Interest Exercisable (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Foreign exchange differences Unrealized Gain (Loss), Foreign Currency Transaction, before Tax Deferred Shares Deferred Shares Deferred Shares [Member] Deferred Class A Shares [Member] Upfront payment paid Royalty And Milestone Liability, Gross Royalty And Milestone Liability, Gross Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Numerator Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]