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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, 2024
Dec. 31, 2023
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year $ 5,404  
Balance at end of year 5,354 $ 5,404
At Cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 16,489 14,534
Additions 2,361 6,328
Disposals (159) (101)
Transfer to lease receivable   (4,100)
Disposals due to deconsolidation of IsoEnergy   (172)
Balance at end of year 18,691 16,489
Accumulated Depreciation [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 11,085 9,532
Disposals   (81)
Depreciation 2,252 1,768
Disposals due to deconsolidation of IsoEnergy   (134)
Balance at end of year 13,337 11,085
Machinery And Equipment [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 3,187  
Balance at end of year 4,090 3,187
Machinery And Equipment [Member] | At Cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 8,366 6,665
Additions 2,109 6,009
Disposals (159) (101)
Transfer to lease receivable   (4,100)
Disposals due to deconsolidation of IsoEnergy   (107)
Balance at end of year 10,316 8,366
Machinery And Equipment [Member] | Accumulated Depreciation [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 5,179 4,703
Disposals   (81)
Depreciation 1,047 626
Disposals due to deconsolidation of IsoEnergy   (69)
Balance at end of year 6,226 5,179
Computer Equipment And Software [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 151  
Balance at end of year 254 151
Computer Equipment And Software [Member] | At Cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 1,979 1,978
Additions 252 66
Disposals 0 0
Transfer to lease receivable   0
Disposals due to deconsolidation of IsoEnergy   (65)
Balance at end of year 2,231 1,979
Computer Equipment And Software [Member] | Accumulated Depreciation [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 1,828 1,731
Disposals   0
Depreciation 149 162
Disposals due to deconsolidation of IsoEnergy   (65)
Balance at end of year 1,977 1,828
Other [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 2,066  
Balance at end of year 1,010 2,066
Other [member] | At Cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 6,144 5,891
Additions 0 253
Disposals 0 0
Transfer to lease receivable   0
Disposals due to deconsolidation of IsoEnergy   0
Balance at end of year 6,144 6,144
Other [member] | Accumulated Depreciation [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Balance at beginning of year 4,078 3,098
Disposals   0
Depreciation 1,056 980
Disposals due to deconsolidation of IsoEnergy   0
Balance at end of year $ 5,134 $ 4,078