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Income Tax -Temporary differences between the carrying amounts of assets and liabilities (Details) - CAD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Temporary tax differences between assets and liabilities    
Total unrecognized temporary differences $ 82,116 $ 81,788
Non-capital loss carry-forwards    
Temporary tax differences between assets and liabilities    
Total unrecognized temporary differences 29,192 37,505
Exploration and evaluation properties    
Temporary tax differences between assets and liabilities    
Total unrecognized temporary differences 19,937 16,521
Capital loss carry-forward    
Temporary tax differences between assets and liabilities    
Total unrecognized temporary differences 21,542 20,059
Other    
Temporary tax differences between assets and liabilities    
Total unrecognized temporary differences $ 11,445 $ 7,703