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INVESTMENTS - Rollforward (Details)
 12 Months Ended
Dec. 31, 2022
CAD ($)
Dec. 31, 2021
CAD ($)
Dec. 31, 2021
USD ($)
Statement [Line Items]      
Investments beginning balance $ 147,692,000 $ 16,950,000  
Investments-uranium beginning balance 133,114,000    
Purchase of investments 0 91,674,000  
Sale of investments   (12,826,000)  
Change in fair value gain to profit and (loss) 55,327,000 44,163,000  
Change in fair value gain to profit and (loss) 22,953,000 51,894,000  
Investments-uranium ending balance 162,536,000 133,114,000  
Investments ending balance 170,645,000 147,692,000  
Equity Instruments      
Statement [Line Items]      
Investments beginning balance 14,578,000 16,950,000  
Purchase of investments   0  
Sale of investments   (12,826,000)  
Change in fair value gain to profit and (loss) (6,469,000) 10,454,000  
Investments ending balance 8,109,000 14,578,000  
Physical Uranium      
Statement [Line Items]      
Investments beginning balance 133,114,000    
Investments-uranium beginning balance 133,114,000 0  
Purchase of investments   91,674,000 $ 74,140,000
Sale of investments   0  
Change in fair value gain to profit and (loss) 29,422,000 41,440,000  
Investments-uranium ending balance 162,536,000 133,114,000  
Investments ending balance $ 162,536,000 $ 133,114,000