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Mineral property, plant and equipment (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
May 31, 2024 | Aug. 31, 2023
IfrsStatementLineItems [Line Items] |  |  |
Net book value |  | $ 72,504 | $ 64,059
Exploration And Evaluation Expenditures [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net book value | [1] | 2,152 | 1,864
Mining property [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net book value |  | 42,727 | 40,303
Processing Plant And Related Infrastructure [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net book value |  | 26,766 | 20,925
Machinery [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net book value | [2] | 733 | 796
Other [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net book value | [3] | 126 | 171
Total [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net book value |  | 72,504 | $ 64,059
Gross carrying amount [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Cost beginning balance |  | 68,104 |
Additions |  | 10,252 |
Cost ending balance |  | 78,356 |
Gross carrying amount [member] | Exploration And Evaluation Expenditures [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Cost beginning balance | [1] | 1,864 |
Additions | [1] | 288 |
Cost ending balance | [1] | 2,152 |
Gross carrying amount [member] | Mining property [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Cost beginning balance |  | 41,202 |
Additions |  | 3,792 |
Cost ending balance |  | 44,994 |
Gross carrying amount [member] | Processing Plant And Related Infrastructure [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Cost beginning balance |  | 23,063 |
Additions |  | 6,051 |
Cost ending balance |  | 29,114 |
Gross carrying amount [member] | Machinery [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Cost beginning balance | [2] | 1,624 |
Additions | [2] | 108 |
Cost ending balance | [2] | 1,732 |
Gross carrying amount [member] | Other [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Cost beginning balance | [3] | 351 |
Additions | [3] | 13 |
Cost ending balance | [3] | 364 |
Accumulated depreciation and amortisation [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Cost beginning balance |  | 4,045 |
Additions |  | 1,807 |
Cost ending balance |  | 5,852 |
Accumulated depreciation and amortisation [member] | Exploration And Evaluation Expenditures [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Cost beginning balance | [1] |  |
Additions | [1] |  |
Cost ending balance | [1] |  |
Accumulated depreciation and amortisation [member] | Mining property [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Cost beginning balance |  | 899 |
Additions |  | 1,368 |
Cost ending balance |  | 2,267 |
Accumulated depreciation and amortisation [member] | Processing Plant And Related Infrastructure [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Cost beginning balance |  | 2,138 |
Additions |  | 210 |
Cost ending balance |  | 2,348 |
Accumulated depreciation and amortisation [member] | Machinery [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Cost beginning balance | [2] | 828 |
Additions | [2] | 171 |
Cost ending balance | [2] | 999 |
Accumulated depreciation and amortisation [member] | Other [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Cost beginning balance | [3] | 180 |
Additions | [3] | 58 |
Cost ending balance | [3] | $ 238 |
[1] | Represents exploration and evaluation expenditures related to the Eastern Porphyry and Anfield deposits on the Buckreef property.
[2] | Includes automotive, computer equipment and software.
[3] | Includes leasehold improvements and right-of-use assets.

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- Definition The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2023-01-01 -Paragraph 73 -Subparagraph e -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2023-en-r&anchor=para_73_e_i&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. Note that right-of-use assets are not included. [Contrast: Property, plant and equipment including right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2023-01-01 -Paragraph 73 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2023-en-r&anchor=para_73_e&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 54 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_54_a&doctype=Standard -URIDate 2023-03-23 + Details
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- References No definition available. + Details
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