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Property and Equipment - Summary of Detailed Information about Property, Plant and Equipment (Detail) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year $ 5,048  
Balance at end of year 5,404 $ 5,048
At Cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 16,613 16,357
Additions 6,328 256
Disposals (101)  
Transfer to lease receivable (4,100)  
Disposals due to deconsolidation of IsoEnergy (172)  
Balance at end of year 18,568 16,613
Accumulated Depreciation [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 11,565 9,738
Disposals (81)  
Depreciation 1,814 1,827
Disposals due to deconsolidation of IsoEnergy (134)  
Balance at end of year 13,164 11,565
Software [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 144  
Balance at end of year 65 144
Software [member] | At Cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 1,359 1,355
Additions 0 4
Transfer to lease receivable 0  
Disposals due to deconsolidation of IsoEnergy (65)  
Balance at end of year 1,294 1,359
Software [member] | Accumulated Depreciation [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 1,215 1,043
Depreciation 79 172
Disposals due to deconsolidation of IsoEnergy (65)  
Balance at end of year 1,229 1,215
Computer Equipment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 103  
Balance at end of year 86 103
Computer Equipment [member] | At Cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 619 497
Additions 66 122
Transfer to lease receivable 0  
Disposals due to deconsolidation of IsoEnergy 0  
Balance at end of year 685 619
Computer Equipment [member] | Accumulated Depreciation [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 516 427
Depreciation 83 89
Disposals due to deconsolidation of IsoEnergy 0  
Balance at end of year 599 516
Field Equipment and Vehicles [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 1,962  
Balance at end of year 3,187 1,962
Field Equipment and Vehicles [member] | At Cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 6,665 6,645
Additions 6,009 20
Disposals (101)  
Transfer to lease receivable (4,100)  
Disposals due to deconsolidation of IsoEnergy (107)  
Balance at end of year 8,366 6,665
Field Equipment and Vehicles [member] | Accumulated Depreciation [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 4,703 4,180
Disposals (81)  
Depreciation 626 523
Disposals due to deconsolidation of IsoEnergy (69)  
Balance at end of year 5,179 4,703
Office Furniture and Leasehold Improvements [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 2,793  
Balance at end of year 2,066 2,793
Office Furniture and Leasehold Improvements [Member] | At Cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 5,891 5,781
Additions 253 110
Disposals 0  
Transfer to lease receivable 0  
Disposals due to deconsolidation of IsoEnergy 0  
Balance at end of year 6,144 5,891
Office Furniture and Leasehold Improvements [Member] | Accumulated Depreciation [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 3,098 2,116
Disposals 0  
Depreciation 980 982
Disposals due to deconsolidation of IsoEnergy 0  
Balance at end of year 4,078 3,098
Road [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 46  
Balance at end of year 0 46
Road [member] | At Cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 2,079 2,079
Transfer to lease receivable 0  
Disposals due to deconsolidation of IsoEnergy 0  
Balance at end of year 2,079 2,079
Road [member] | Accumulated Depreciation [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 2,033 1,972
Depreciation 46 61
Disposals due to deconsolidation of IsoEnergy 0  
Balance at end of year $ 2,079 $ 2,033