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Revenue recognition Revenue [Policy Text Block] Schedule Of Stock By Class [Table] Schedule of Stock by Class [Table] Average expected term (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Royalty obligations Royalty Obligations Royalty obligations. Future Clinical Development And Global Regulatory Approval Milestone Payments [Member] Future Clinical Development And Global Regulatory Approval Milestone Payments [Member] Future clinical development and global regulatory approval milestone payments. Debt Securities, Available-for-Sale [Table] Entity Voluntary Filers Entity Voluntary Filers Neurocrine Biosciences [Member] Neurocrine Biosciences [Member] Neurocrine biosciences. 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Tax Credit Carryforward Tax Credit Carryforward [Axis] 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, Option, Nonvested, Weighted Average Exercise Price Shareholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Foreign exchange (loss) gain Foreign Currency Transaction Gain (Loss), before Tax, Total Foreign Currency Transaction Gain (Loss), before Tax Counterparty Name Counterparty Name [Axis] Foreign currency translation Foreign Currency Transactions and Translations Policy [Policy Text Block] Milestone payment due on initiation of Phase 1b clinical trial Milestone Payment Due On Initiation Of Phase1b Clinical Trial Milestone payment due on initiation of Phase 1b clinical trial. Subsequent Event [Member] Subsequent Event [Member] Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total Unrecognized stock-based compensation cost Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Related Party Transaction Related Party Transaction [Domain] Research Equipment [Member] Research Equipment [Member] Research equipment. Impairment of long-lived assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Aggregate Intrinsic Value, Exercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount, Total Non-deductible expenditures Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount Priority Access Agreement with Medpace Inc. [Member] Medpace Clinical Development Service Agreement [Member] Medpace clinical development service agreement. License and Collaboration Agreement [Member] License And Collaboration Agreement [Member] License and Collaboration Agreement. Loan Agreement [Member] Loan And Security Agreement [Member] Loan and security agreement. Research and Development Expense, Total Research and development Research and Development Expense Total future minimum lease payments Lessee, Operating Lease, Liability, to be Paid Operating lease term Lessee, Operating Lease, Term of Contract Jefferies and Stifel [Member] Jefferies and Stifel [Member] Jefferies L L C And Stifel Nicolaus Company Incorporated [Member] Jefferies LLC and Stifel, Nicolaus & Company, Incorporated member. Marketable securities, long-term (note 7) Marketable Securities, Noncurrent Intellectual property Legal Costs, Policy [Policy Text Block] Jefferies L L C, Stifel Nicolaus Company Incorporated, J.P.Morgan Securities LLC and SVB Securities LLC. Jefferies L L C Stifel Nicolaus Company Incorporated J P Morgan Securities L L C And S V B Securities L L C [Member] Jefferies, Stifel, J.P. Morgan Securities LLC and SVB Securities LLC [Member] Entity Central Index Key Entity Central Index Key Share Capital [Table] Share Capital [Table] Share capital. Other income (expense): Other Income and Expenses [Abstract] Shares cancelled Stock issued during period common shares cancelled. Stock Issued During Period Common Shares Cancelled Accounting Policies [Abstract] Investments, Debt and Equity Securities [Abstract] Weighted Average Grant Date Fair Value, Vested Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value Schedule Of Available For Sale Securities [Line Items] Debt Securities, Available-for-Sale [Line Items] Variable consideration allocated to performance obligation Variable Consideration Allocated To Performance Obligation Variable consideration allocated to performance obligation. 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 and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Schedule Of Property Plant And Equipment [Table] Property, Plant and Equipment [Table] Expected volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Series1 Preferred Shares Series1 Preferred Shares [Member] Series 1 preferred shares. Measurement Frequency [Axis] Number of restricted share awards, restricted share unit awards or performance awards available for issue Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant General and Administrative Expense, Total General and administrative General and Administrative Expense Organization, Consolidation and Presentation of Financial Statements [Abstract] Options Outstanding, Weighted Average Exercise Price Weighted Average Exercise Price Outstanding, Beginning balance Weighted Average Exercise Price Outstanding, Ending balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Jefferies LLC SVB Leerink LLC and Stifel Nicolaus Company Incorporated [Member] Jefferies L L C S V B Leerink L L C And Stifel Nicolaus Company Incorporated [Member] Jefferies LLC SVB leerink LLC and stifel nicolaus company incorporated. Research and development [Member] Research and Development Expense [Member] Silicon Valley Bank [Member] Silicon Valley Bank [Member] Silicon valley bank. Right-of-use asset obtained in exchange for new operating lease liability (note 9) Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Accumulated Deficit [Member] Retained Earnings [Member] Tax Credit Carryforward, Name Tax Credit Carryforward, Name [Domain] Preferred shares convertible into common shares Preferred Stock, Conversion Basis Unfavorable change in interest rates of marketable securities Unfavorable Change In Interest Rates Of Marketable Securities Unfavorable change in interest rates of marketable securities. Commercial Milestone Payments [Member] Commercial Milestone Payments [Member] Commercial milestone payments. Basis of Presentation [Line Items] Basis Of Presentation [Line Items] Basis of presentation. Research and Development Arrangement, Contract to Perform for Others, Type Research and Development Arrangement, Contract to Perform for Others, Type [Axis] Property, Plant and Equipment, Gross, Ending Balance Property, Plant and Equipment, Gross, Beginning Balance Property, Plant and Equipment, Gross, Total Property, plant and equipment Property, Plant and Equipment, Gross Entity Interactive Data Current Entity Interactive Data Current Tax credit available to offset taxes payable Tax Credit Carryforward, Amount Entity Public Float Entity Public Float Collaborate agreement premium related to equity investment Collaborate Agreement Premium Related To Equity Investment Collaborate agreement premium related to equity investment. 2023 Lessee, Operating Lease, Liability, to be Paid, Year One Recognition of the transaction price Recognition Of Transaction Price Recognition of transaction price. Performance obligations in relation to this milestone. Performance Obligations Related To Milestone Performance obligation related to milestone Leasehold Improvements [Member] Leasehold Improvements [Member] Sale proceeds from issuance of pre funded warrants Proceeds from Issuance of Warrants Local Phone Number Local Phone Number Canadian federal and provincial tax rates Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Unrecognized Tax Benefits, Ending Balance Unrecognized Tax Benefits, Beginning Balance Unrecognized tax benefits of uncertain tax positions Unrecognized Tax Benefits Percentage of option to co-fund development costs upon achievement of certain milestones Percentage Of Option To Fund Development Costs Upon Achievement Of Certain Milestones Percentage of option to fund development costs upon achievement of certain milestones. Schedule of Financial Assets Measured at Fair Value on a Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Debt Disclosure [Abstract] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Number of Options Exercisable, End of period Number of Options Exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Operating lease, description Lessee, Operating Lease, Description Consolidated Entities Consolidated Entities [Axis] Lender Name Lender Name [Axis] Options granted Number of Options, Granted Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Category of Item Purchased Category of Item Purchased [Axis] Income Statement Location Income Statement Location [Domain] Property, Plant and Equipment [Abstract] Balance (in Shares) Balance (in Shares) Shares, Outstanding Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Date of incorporation Entity Incorporation, Date of Incorporation Number of Options Outstanding Number of Options Outstanding, Beginning balance Number of Options Outstanding, Ending balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Marketable securities (note 7) Marketable Securities, Current Document Fiscal Year Focus Document Fiscal Year Focus Milestone payment paid Milestone Payments Paid Milestone payments paid. 2024 Lessee, Operating Lease, Liability, to be Paid, Year Two Basic Earnings Per Share, Basic Earnings Per Share, Basic, Total Tax Credit Carryforward [Table] Tax Credit Carryforward [Table] Development Services Under the Initial Development Program for the DTCs [Member] Development Services Under Initial Development Program For D T Cs [Member] Development services under the initial development program for the DTCs. Assets Assets [Abstract] Milestone Payment Received in Equity Investment Milestone Payment Received In Equity Investment Milestone payment received in equity investment. Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Aggregate purchase price per share Shares Issued, Price Per Share Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount, Total Other Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Financial Instrument [Axis] Long-Lived Tangible Asset Long-Lived Tangible Asset [Axis] Concentration Risk Benchmark Concentration Risk Benchmark [Axis] Deferred revenue Deferred Tax Assets, Deferred Income Liabilities and shareholders’ equity Liabilities and Equity [Abstract] Property, plant and equipment Property, Plant and Equipment, Policy [Policy Text Block] Net deferred income tax assets Deferred Tax Assets, Net of Valuation Allowance Convertible Preferred Shares [Member] Preferred Stock [Member] Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Unrealized foreign exchange loss (gain) Foreign Currency Transaction Gain (Loss), Unrealized Current assets: Assets, Current [Abstract] Asset Purchase Agreement [Member] Asset Purchase Agreement [Member] Asset purchase agreement. Cash and Money Market Fund [Member] Cash and money market fund. Exercise Price Warrants exercise price per common share Class of Warrant or Right, Exercise Price of Warrants or Rights Decrease in the fair value of marketable securities Increase Decrease In Fair Value Of Marketable Securities Increase (Decrease) in fair value of marketable securities. Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares [Roll Forward] Contractual maturity of 1 to 3 years, Fair Value Debt Securities, Available-for-Sale, Noncurrent Trade payables Accounts Payable, Trade, Current Schedule of Net Deferred Income Tax Assets Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Fair Value Hierarchy and NAV [Domain] Purchases of property, plant and equipment included in accounts payable and accrued expenses Purchases Of Property, Plant And Equipment Included In Accounts Payable And Accrued Expenses Purchases of property, plant and equipment included in accounts payable and accrued expenses. Payables and Accruals [Abstract] Measurement Frequency [Domain] Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Basis Of Presentation [Table] Basis Of Presentation [Table] Basis of presentation. Share Capital [Line Items] Share Capital [Line Items] Share capital. Cover [Abstract] Concentration Risk, Percentage Concentration Risk, Percentage Product and Service Product and Service [Domain] Accounting Changes and Error Corrections [Abstract] 2027 Lessee, Operating Lease, Liability, to be Paid, Year Five Servicing Assets and Servicing Liabilities Risk Servicing Assets and Servicing Liabilities Risk [Axis] Current liabilities: Liabilities, Current [Abstract] Maximum [Member] Maximum [Member] Net Income Loss Available To Preferred Stockholders Basic, Total Net loss attributable to preferred shareholders Net Income Loss Available To Preferred Stockholders Basic Net income (loss) available to preferred stockholders basic. Interest received. Interest Received Interest received Stock Based Compensation Expenses Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Exclusive License to XEN901 and Exclusive License to DTCs [Member] Exclusive License To X E N901 And Exclusive License To D T Cs [Member] Exclusive license to XEN901 and exclusive license to the DTCs. Research and development services Research And Development Services Research and development services. Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Office Furniture and Equipment [Member] Furniture and Fixtures [Member] Number of Options, Exercised Issued pursuant to exercise of stock options (in Shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Number of warrants exercised Number Of Warrants Exercised Number of warrants exercised. Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Accounts payable and accrued expenses (note 10) Total Accounts Payable and Accrued Liabilities, Current Exchange Agreement [Member] Exchange Agreement [Member] Exchange agreement. Research and Development Asset, Transaction Research and Development Asset, Transaction [Domain] Use of estimates Use of Estimates, Policy [Policy Text Block] Debt instrument, floating interest rate Debt Instrument, Basis Spread on Variable Rate Significant Accounting Policies [Table] Significant Accounting Policies [Table] Significant accounting policies. Issued pursuant to exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Segment and geographic information Segment Reporting, Policy [Policy Text Block] Sales Based Milestone [Member] Sales Based Milestone [Member] Sales-based milestone. Property, Plant and Equipment, Useful Life Property, Plant and Equipment, Useful Life Commitments And Contingencies [Table] Commitments And Contingencies [Table] Commitments and contingencies. Trading Symbol Trading Symbol Summary of Amortized Cost, Unrealized Losses Recognized in AOCI and Fair Value of Available-for-Sale Securities Debt Securities, Available-for-Sale [Table Text Block] Number of operating leases Lessee Number Of Operating Leases Lessee, number of operating leases. Subsequent Event Type Subsequent Event Type [Axis] Other Deferred Tax Assets, Other Risks Inherent in Servicing Assets and Servicing Liabilities, Type Risks Inherent in Servicing Assets and Servicing Liabilities, Type [Domain] Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Average risk-free interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Unrealized Loss Unrealized Loss Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Other assets Other assets Increase (Decrease) in Other Operating Assets Increase (Decrease) in Other Operating Assets, Total Plan Name Plan Name [Axis] Weighted-average common shares outstanding (note 5): Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Concentration Risk Type Concentration Risk Type [Domain] Common shares, shares authorized Common Stock, Shares Authorized, Unlimited [Fixed List] Computed recoveries at Canadian federal and provincial tax rates Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Long-Lived Tangible Asset Long-Lived Tangible Asset [Domain] Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Variable lease expense Variable Lease, Cost Conversion of preferred share to common shares (note 12d) Stock Issued During Period, Value, Conversion of Convertible Securities Trading Activity, by Type Trading Activity, by Type [Domain] Property, Plant and Equipment Property, Plant and Equipment Disclosure [Text Block] Fair value of stock options exercised on a cashless basis Fair Value Of Stock Options Exercised On Cashless Basis The aggregate grant-date fair value of stock options exercised via net exercise (cashless) during the reporting period as calculated by applying the disclosed option pricing methodology. Property, Plant and Equipment, Estimated Useful Lives Property, Plant and Equipment, Estimated Useful Lives Weighted Average Exercise Price, Granted Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Common shares reserved for issuance Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized Debt Instrument [Line Items] Debt Instrument [Line Items] Long-term Debt, Type Long-Term Debt, Type [Domain] Concentration Risk [Table] Concentration Risk [Table] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Tax Credit Carryforward [Line Items] Tax Credit Carryforward [Line Items] Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments and contingencies. Pre funds warrants outstanding date issuance october two thousand twenty one. Pre Funds Warrants Outstanding Date Issuance October Two Thousand Twenty One [Member] October 2021 Supplemental disclosures of non-cash transactions: Noncash Investing and Financing Items [Abstract]