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Convertible Debentures - Summary of Detailed Information about Convertible Debentures (Detail) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Convertible debentures [line items]    
Beginning $ 80,021 $ 72,011
Fair value on issuance 143,702 5,296
Fair value adjustment 50,177 2,714
Settlement with shares (72,773)  
Disposals due to deconsolidation of IsoEnergy (42,649)  
Ending 158,478 80,021
2023 Debentures [member]    
Convertible debentures [line items]    
Fair value on issuance 143,702  
Fair value adjustment 14,776  
Ending 158,478  
2020 Debentures [member]    
Convertible debentures [line items]    
Beginning 52,615 46,910
Fair value adjustment 20,158 5,705
Settlement with shares (72,773)  
Ending   52,615
2020 IsoEnergy Debentures    
Convertible debentures [line items]    
Beginning 22,269 25,101
Fair value adjustment 13,938 (2,832)
Disposals due to deconsolidation of IsoEnergy (36,207)  
Ending   22,269
2022 IsoEnergy Debentures    
Convertible debentures [line items]    
Beginning 5,137  
Fair value on issuance   5,296
Fair value adjustment 1,305 (159)
Disposals due to deconsolidation of IsoEnergy $ (6,442)  
Ending   $ 5,137