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Income Tax - Additional Information (Detail) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Income Taxes [Line Items]    
Deffered income tax recovery $ (4,567) $ (1,412)
Unused tax credits [member]    
Income Taxes [Line Items]    
Investment tax credits 427  
Unused tax losses [member]    
Income Taxes [Line Items]    
Deffered income tax recovery $ 506,213 $ 368,087