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Annual Increase In Number Of Shares Available For Issuance As Percentage On Outstanding Shares Of Common Stock On Final Day Of Preceding Calendar Year Annual increases in number of shares available for issuance as percentage of outstanding shares common stock on final day of preceding calendar year Antidilutive Securities, Name [Domain] Antidilutive Securities, Name Cash [Member] Cash Cover [Abstract] Vesting [Axis] Document Fiscal Year Focus Document Fiscal Year Focus Sale of Stock [Domain] Sale of Stock Income tax receivable Income Taxes Receivable, Current Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value, Awarded Income taxes Increase (Decrease) in Income Taxes Security Exchange Name Security Exchange Name Expiration period Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Total other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Recently Issued Accounting Pronouncements Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Preferred Stock, Shares Issued, Total Preferred Stock, Shares Issued Preferred stock shares issued Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Right-of-use asset obtained in exchange for new operating lease liability Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Weighted average exercise price, Cancelled or forfeited Legal Entity [Axis] Legal Entity Financial Instrument [Axis] Weighted Average Number of Shares Outstanding, Diluted [Abstract] Denominator: Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options Entity Emerging Growth Company Entity Emerging Growth Company Amendment Flag Amendment Flag Marketable Securities, Current, Total Marketable Securities, Current Marketable securities IPO [Member] Initial Public Offering Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Unrealized losses Unrealized Losses Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Leases [Abstract] Debt securities unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position Debt Securities, Available-for-Sale, Unrealized Loss Position, Total Entity File Number Entity File Number Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] Share-Based Payment Arrangement [Abstract] Accounts Payable, Current, Total Accounts Payable, Current Accounts payable Cash, Cash Equivalents, and Marketable Securities [Text Block] Cash and Cash Equivalents and Marketable Securities Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Weighted average grant date fair value, Beginning balance Weighted average grant date fair value, Ending balance Operating Expenses Total operating expenses Accrued Liabilities and Other Liabilities, Total Accrued Liabilities and Other Liabilities Accrued expenses and other current liabilities Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Expected terms (in years) Entity Address, Address Line Two Entity Address, Address Line Two Preferred shares, no par value per share; unlimited shares authorized as of March 31, 2024 and December 31, 2023, respectively; 0 shares issued and outstanding as of March 31, 2024, and December 2023, respectively Preferred Stock, Value, Issued, Ending Balance Preferred Stock, Value, Issued, Beginning Balance Preferred Stock, Value, Issued, Total Preferred Stock, Value, Issued Entity Small Business Entity Small Business Entity Shell Company Entity Shell Company QUEBEC Montreal, Quebec Unrecognized share-based compensation expense related to unvested restricted share units Common Stock, No Par Value Common stock par value Net Income (Loss) per Share Earnings Per Share [Text Block] Revenues [Abstract] Revenue: Commercial paper Commercial Paper [Member] Entity Address, Address Line One Entity Address, Address Line One Fair Value Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Antidilutive Securities [Axis] Antidilutive Securities Other Liabilities, Current, Total Other Liabilities, Current Other Subsequent Event Type [Domain] Subsequent Event Type Options to License Undruggable Targets Options To License Undruggable Target [Member] Options to license undruggable target. Income Statement Location [Axis] Income Statement Location Variable lease costs Variable Lease, Cost Variable lease costs Milestones payments received Milestones Payments Received Milestones payments received Product research activity. Product Research Activity [Member] 2020 Employee Share Purchase Plan Two thousand twenty employee share purchase plan. Two Thousand Twenty Employee Share Purchase Plan [Member] Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected dividend yield Net income (loss) for the period Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Fair Value, Inputs, Level 2 [Member] Level 2 Collaborative Arrangement and Arrangement Other than Collaborative [Table] Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] Product and Service [Axis] Product and Service Contract with Customer, Liability, Noncurrent Deferred revenue, net of current portion Title of 12(b) Security Title of 12(b) Security Other current receivables Increase (Decrease) in Other Receivables Fair Value, Assets Measured on Recurring Basis [Table Text Block] Schedule of Financial Assets Measured at Fair Value on a Recurring Basis Entity Address, Country Entity Address, Country Net Cash Provided by (Used in) Investing Activities [Abstract] Cash Flows From Investing Activities: Inducement Plan Inducement Option Award [Member] Inducement Option Award [Member] Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset Lessee, Operating Lease, Existence of Option to Terminate [true false] Lessee, operating lease, existence of option to terminate Increase in collaboration revenue Collaboration revenue receivable Increase Decrease in Collaboration Revenue Receivable Increase decrease in collaboration revenue receivable. Cash and Cash Equivalents [Axis] Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding, Beginning Balance Common Stock, Shares, Outstanding Common stock shares outstanding Option fee payment Option Fee Option fee. Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Risk-free interest rate Share-Based Payment Arrangement [Text Block] Share-Based Compensation Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Weighted Average Grant Date Fair Value Forfeited Bristol-Myers Squibb Company. Bristol Myers Squibb Company [Member] Bristol-Myers Squibb Company Income Statement Location [Domain] Income Statement Location Weighted average exercise price of stock options granted Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Document Type Document Type Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Document Quarterly Report Document Quarterly Report Collaboration payable Collaboration Payable Collaboration payable. Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Restricted stock units, Forfeited Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Entity Filer Category Entity Filer Category Payments to Acquire Marketable Securities, Total Payments to Acquire Marketable Securities Purchase of marketable securities Asset Class [Axis] Asset Class Total other income, net Nonoperating Income (Expense) Property and equipment purchases incurred but not yet paid Capital Expenditures Incurred but Not yet Paid Liabilities TOTAL LIABILITIES Foreign exchange (gain) loss Foreign currency transaction gain (loss). Foreign Currency Transaction Gain Loss Foreign exchange (gain) loss Equity, Attributable to Parent Balance Balance Total shareholders’ equity Net income (loss) Other income (expense), net Nonoperating Income (Expense) [Abstract] Upfront non refundable first payment received member. Upfront Non Refundable First Payment Received [Member] Upfront non refundable first payment received Cash and Cash Equivalents [Domain] Corporate debt securities Corporate Debt Securities [Member] Statement of Financial Position [Abstract] Clinical trial materials Clinical Trial Materials [Member] Clinical Trial Materials [Member] Weighted Average Number of Shares Outstanding, Diluted, Total Weighted Average Number of Shares Outstanding, Diluted Weighted-average common shares outstanding-diluted Weighted-average number of common shares outstanding-diluted Shares Issued, Price Per Share Shares issued, price per share Debt Securities, Available-for-Sale, Amortized Cost Amortized Cost Weighted-average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Use of Estimates, Policy [Policy Text Block] Use of Estimates Additional Clinical Development Plan [Member] Additional Clinical Development Plan [Member] Product additional clinical development plan Smaller reporting company policy text block Smaller Reporting Company Policy Text Block Smaller Reporting Company Weighted average exercise price, Outstanding at end of period Weighted average exercise price, Outstanding at beginning of period Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Accrued Property and Equipment Purchases Accrued property and equipment purchases. Accrued property and equipment purchases Summary of Computation of Basic and Diluted Net Income (Loss) Per Share Attributable To Common Shareholders Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Disaggregation of Revenue [Line Items] Completion of continuing trials Completion of Continuing Trials [Member] Completion of Continuing Trials [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Fair Value Disclosures [Abstract] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV Measurement Frequency [Domain] Measurement Frequency Payments to Acquire Property, Plant, and Equipment, Total Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Marketable securities Marketable securities. Marketable Securities [Member] Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Restricted stock units, Vested and released Employee-related Liabilities, Current, Total Employee-related Liabilities, Current Accrued compensation and benefits Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Classified as short-term Deferred Revenue, Current, Total Deferred Revenue, Current Deferred revenue, current Proceeds from Sale and Maturity of Marketable Securities, Total Proceeds from Sale and Maturity of Marketable Securities Proceeds from maturities of marketable securities Collaboration term expiration date Collaboration Term Expiration Date Collaboration term expiration date.