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Income taxes (Tables)
 12 Months Ended
Dec. 31, 2024
Income Taxes [Abstract]  
Schedule of Major Components of Tax Expense (income)
The components of income tax benefit (expense) included in the determination of the profit (loss) from continuing operations comprise of:
20242023
Current tax expense
Current period income tax$121 $64 
Withholding tax— 94 
Total current tax expense$121 $158 
Deferred tax expense
Origination and reversal of temporary differences$(14,279)$(45,050)
Adjustments for prior periods1,648 2,174 
Change in unrecognized deductible temporary differences12,631 42,876 
Total deferred tax expense$— $— 
Total income tax expense from continuing operations$121 $158 
Schedule of Reconciliation of Accounting Profit
The Corporation’s effective income tax rate differs from the combined Canadian federal and provincial statutory income tax rate for companies. The principal factors causing the difference are as follows:
20242023
Net loss before income taxes (from continuing operations)$(323,409)$(144,052)
Expected tax recovery at 27.00% (2023 – 27.00%)$(87,320)$(38,894)
Increase (reduction) in income taxes resulting from:
Non-deductible expenses (non-taxable income)53,847 (993)
Expiry of losses and ITC310 96 
Investment tax credits earned(4,703)(4,009)
Foreign tax rate and tax rate differences3,415 4,165 
Change in unrecognized deductible temporary differences34,514 39,674 
Other58 119 
Income taxes from continuing operations$121 $158 
Schedule of Temporary Difference, Unused Tax Losses and Unused Tax Credits
At December 31, 2024, the Corporation did not recognize any deferred tax assets resulting from the following deductible temporary differences for financial statement and income tax purposes.
27.     Income taxes (cont'd):
(b)    Unrecognized deferred tax asset (cont'd):
20242023
Scientific research expenditures$148,077 $143,663 
Investments43,891 36,315 
Share issuance costs4,633 14,145 
Losses from operations carried forward440,572 394,599 
Capital losses carried forward4,843 10,703 
Investment tax credits48,277 46,810 
Property, plant and equipment and intangible assets226,425 221,365 
$916,718 $867,600 
The Corporation has available to carry forward the following as at December 31:
20242023
Canadian scientific research expenditures$148,077 $143,663 
Canadian losses from operations288,258 262,887 
Canadian capital losses from operations9,827 12,958 
Canadian investment tax credits48,277 46,810 
German losses from operations for corporate tax purposes— 46 
US federal losses from operations42,949 46,784 
Denmark losses from operations81,130 65,786 
Hong Kong losses from operations128 116 
UK losses from operations20,440 13,085 
UK research and development tax credits120 122