v3.26.1
Taxes - Schedule of detailed information about deductible temporary differences (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Canada [Member] | Non-capital loss carry-forwards [Member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognized $ 24,358 $ 32,408
Canada [Member] | Mine properties, plant and equipment [Member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognized 18,394 17,574
Canada [Member] | Capital losses [Member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognized 12,260 12,260
Canada [Member] | Vanadium Assets [Member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognized 6,168 6,608
Canada [Member] | ITCs [Member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognized 284 270
Canada [Member] | Share issue costs [Member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognized 520 214
Ireland [Member] | Non-capital loss carry-forwards [Member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognized 34,294 24,715
Ireland [Member] | Mine properties, plant and equipment [Member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognized 1 1
U.S. [Member] | Non-capital loss carry-forwards [Member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognized 76,743 59,845
U.S. [Member] | Inventory [Member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognized 0 7,116
U.S. [Member] | Provisions and other [Member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognized 2,702 1,180
U.S. [Member] | Mine properties, plant and equipment [Member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognized $ 0 $ 501