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Marketable Securities - Summary of Detailed Information about Disposal of Marketable Securities (Detail) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Marketable Securities [line Items]    
Cash $ 192 $ 0
Gain on sale of assets 3,595 $ 0
Clover, Gemini and Tower uranium properties [Member]    
Disclosure Of Marketable Securities [line Items]    
Marketable securities received 2,068  
Cash 192  
Proceeds – disposition of properties 2,260  
Cost – disposition of properties (35)  
Gain on sale of assets 2,225  
Mountain Lake property [Member]    
Disclosure Of Marketable Securities [line Items]    
Marketable securities received 1,476  
Cash 20  
Proceeds – disposition of properties 1,496  
Cost – disposition of properties (126)  
Gain on sale of assets $ 1,370