XML 86 R51.htm IDEA: XBRL DOCUMENT v3.24.0.1
Exploration and Evaluation Assets - Summary of Capitalized Costs on Projects (Detail) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of exploration and expenditure assets [line items]    
Exploration and evaluation assets, beginning balance $ 405,248  
Exploration and evaluation assets, ending balance 451,356 $ 405,248
Acquisition cost [member]    
Disclosure of exploration and expenditure assets [line items]    
Exploration and evaluation assets, beginning balance 28,321 28,353
Additions 5 10
Disposals due to deconsolidation of IsoEnergy (26,632)  
Dispositions   (42)
Exploration and evaluation assets, ending balance 1,694 28,321
Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Exploration and evaluation assets, beginning balance 376,927 298,190
Expense arising from exploration for and evaluation of mineral resources 128,329 78,737
Disposals due to deconsolidation of IsoEnergy (55,594)  
Exploration and evaluation assets, ending balance 449,662 376,927
Rook 1 Property [member]    
Disclosure of exploration and expenditure assets [line items]    
Exploration and evaluation assets, beginning balance 329,247  
Exploration and evaluation assets, ending balance 428,633 329,247
Rook 1 Property [member] | Acquisition cost [member]    
Disclosure of exploration and expenditure assets [line items]    
Exploration and evaluation assets, beginning balance 235 235
Additions 0 0
Disposals due to deconsolidation of IsoEnergy 0  
Dispositions   0
Exploration and evaluation assets, ending balance 235 235
Rook 1 Property [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Exploration and evaluation assets, beginning balance 329,012 260,941
Expense arising from exploration for and evaluation of mineral resources 105,612 68,071
Disposals due to deconsolidation of IsoEnergy (6,226)  
Exploration and evaluation assets, ending balance 428,398 329,012
Other Athabasca Basin Properties [member]    
Disclosure of exploration and expenditure assets [line items]    
Exploration and evaluation assets, beginning balance 11,061  
Exploration and evaluation assets, ending balance 22,723 11,061
Other Athabasca Basin Properties [member] | Acquisition cost [member]    
Disclosure of exploration and expenditure assets [line items]    
Exploration and evaluation assets, beginning balance 1,458 1,458
Additions 1 0
Disposals due to deconsolidation of IsoEnergy 0  
Dispositions   0
Exploration and evaluation assets, ending balance 1,459 1,458
Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Exploration and evaluation assets, beginning balance 9,603 9,180
Expense arising from exploration for and evaluation of mineral resources 11,661 423
Disposals due to deconsolidation of IsoEnergy 0  
Exploration and evaluation assets, ending balance 21,264 9,603
General exploration and drilling [Member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 19,576 13,318
General exploration and drilling [Member] | Rook 1 Property [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 6,488 7,705
General exploration and drilling [Member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 7,574 0
Environmental, permitting, and engagement [Member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 17,583 12,005
Environmental, permitting, and engagement [Member] | Rook 1 Property [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 17,583 12,005
Environmental, permitting, and engagement [Member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 0 0
Technical, engineering and design [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 59,917 32,703
Technical, engineering and design [member] | Rook 1 Property [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 59,863 32,703
Technical, engineering and design [member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 0 0
Geochemistry and assays [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 143 190
Geochemistry and assays [member] | Rook 1 Property [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 0 0
Geochemistry and assays [member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 0 0
Geological and Geophysical [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 6,033 3,957
Geological and Geophysical [member] | Rook 1 Property [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 323 1,941
Geological and Geophysical [member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 2,978 423
Labour and Wages [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 16,953 9,655
Labour and Wages [member] | Rook 1 Property [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 14,796 8,818
Labour and Wages [member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 1,109 0
Share-based Payments [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 6,867 6,364
Share-based Payments [member] | Rook 1 Property [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 5,605 4,532
Share-based Payments [member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 0 0
Travel [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 1,257 545
Travel [member] | Rook 1 Property [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 954 367
Travel [member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 0 0
IsoEnergy Ltd. [member]    
Disclosure of exploration and expenditure assets [line items]    
Exploration and evaluation assets, beginning balance 64,940  
Exploration and evaluation assets, ending balance 0 64,940
IsoEnergy Ltd. [member] | Acquisition cost [member]    
Disclosure of exploration and expenditure assets [line items]    
Exploration and evaluation assets, beginning balance 26,628 26,660
Additions 4 10
Disposals due to deconsolidation of IsoEnergy (26,632)  
Dispositions   (42)
Exploration and evaluation assets, ending balance 0 26,628
IsoEnergy Ltd. [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Exploration and evaluation assets, beginning balance 38,312 28,069
Expense arising from exploration for and evaluation of mineral resources 11,056 10,243
Disposals due to deconsolidation of IsoEnergy (49,368)  
Exploration and evaluation assets, ending balance 0 38,312
IsoEnergy Ltd. [member] | General exploration and drilling [Member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 5,514 5,613
IsoEnergy Ltd. [member] | Environmental, permitting, and engagement [Member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 0 0
IsoEnergy Ltd. [member] | Technical, engineering and design [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 54 0
IsoEnergy Ltd. [member] | Geochemistry and assays [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 143 190
IsoEnergy Ltd. [member] | Geological and Geophysical [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 2,732 1,593
IsoEnergy Ltd. [member] | Labour and Wages [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 1,048 837
IsoEnergy Ltd. [member] | Share-based Payments [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources 1,262 1,832
IsoEnergy Ltd. [member] | Travel [member] | Deferred Exploration Costs [member]    
Disclosure of exploration and expenditure assets [line items]    
Expense arising from exploration for and evaluation of mineral resources $ 303 $ 178