v3.25.2
Mineral property, plant and equipment (Details) - USD ($)
$ in Thousands
 9 Months Ended
May 31, 2025
Aug. 31, 2024
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment $ 85,637 $ 77,817
Exploration And Evaluation Expenditures [Member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment [1] 3,035 2,281
Mining property [member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment 46,618 45,285
Processing Plant And Related Infrastructure [Member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment 30,545 27,483
Machinery [member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment [2] 948 974
Rightofuse Asset [Member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment [3] 4,395 1,683
Other [Member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment [3] 96 111
Total [Member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment 85,637 $ 77,817
Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment 84,344  
Depreciation 10,475  
Mineral property, plant and equipment 94,819  
Gross carrying amount [member] | Exploration And Evaluation Expenditures [Member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment [1] 2,281  
Depreciation [1] 754  
Mineral property, plant and equipment [1] 3,035  
Gross carrying amount [member] | Mining property [member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment 48,161  
Depreciation 2,742  
Mineral property, plant and equipment 50,903  
Gross carrying amount [member] | Processing Plant And Related Infrastructure [Member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment 29,948  
Depreciation 3,448  
Mineral property, plant and equipment 33,396  
Gross carrying amount [member] | Machinery [member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment [2] 2,041  
Depreciation [2] 205  
Mineral property, plant and equipment [2] 2,246  
Gross carrying amount [member] | Rightofuse Asset [Member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment [3] 1,721  
Depreciation [3] 3,326  
Mineral property, plant and equipment [3] 5,047  
Gross carrying amount [member] | Other [Member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment [3] 192  
Depreciation [3]  
Mineral property, plant and equipment [3] 192  
Accumulated depreciation and amortisation [member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment 6,527  
Depreciation 2,655  
Mineral property, plant and equipment 9,182  
Accumulated depreciation and amortisation [member] | Exploration And Evaluation Expenditures [Member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment [1]  
Depreciation [1]  
Mineral property, plant and equipment [1]  
Accumulated depreciation and amortisation [member] | Mining property [member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment 2,876  
Depreciation 1,409  
Mineral property, plant and equipment 4,285  
Accumulated depreciation and amortisation [member] | Processing Plant And Related Infrastructure [Member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment 2,465  
Depreciation 386  
Mineral property, plant and equipment 2,851  
Accumulated depreciation and amortisation [member] | Machinery [member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment [2] 1,067  
Depreciation [2] 231  
Mineral property, plant and equipment [2] 1,298  
Accumulated depreciation and amortisation [member] | Rightofuse Asset [Member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment [3] 38  
Depreciation [3] 614  
Mineral property, plant and equipment [3] 652  
Accumulated depreciation and amortisation [member] | Other [Member]    
IfrsStatementLineItems [Line Items]    
Mineral property, plant and equipment [3] 81  
Depreciation [3] 15  
Mineral property, plant and equipment [3] $ 96  
[1] Represents exploration and evaluation expenditures related to the Anfield and Stamford Bridge deposits on the Buckreef property.
[2] Includes automotive and computer equipment and software.
[3] Includes leasehold improvements.