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Income Taxes - Summary of Deferred Tax (Assets) and Liabilities (Detail) - CAD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Net deferred tax liabilities $ 0 $ 867 $ 2,536
Exploration and evaluation assets [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Net deferred tax liabilities 46,658 39,120  
Convertible debentures [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Net deferred tax liabilities 1,559 66  
Non-capital losses [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Net deferred tax liabilities (73,070) (38,333)  
Investment in associate [Member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Net deferred tax liabilities 24,853 0  
Share issuance costs [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Net deferred tax liabilities 0 (208)  
Equipment [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Net deferred tax liabilities 0 (79)  
Marketable Securities [Member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Marketable securities $ 0 $ 301