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MINERAL PROPERTIES AND PROPERTY, PLANT AND EQUIPMENT - Schedule of Summary of Mineral Properties (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Property, Plant and Equipment [Line Items] |  |  |  |  |
Mineral properties, net | $ 302,296 |  | $ 302,296 |  | $ 278,330
Mineral Properties, Gross | 305,999 |  | 305,999 |  | 279,400
Mineral Properties, Accumulated Depletion | (3,703) |  | (3,703) |  | (1,070)
Depreciation | 1,300 | $ 660 | 3,730 | $ 1,950 |
Mineral Properties |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Depreciation |  |  |  | $ 230 |
Sheep Mountain |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Mineral properties, net | 34,183 |  | 34,183 |  | 34,183
Bahia Project |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Mineral properties, net | 32,613 |  | 32,613 |  | 32,613
Nichols Ranch ISR Project |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Mineral properties, net | 25,974 |  | 25,974 |  | 25,974
Roca Honda |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Mineral properties, net | 22,095 |  | 22,095 |  | 22,095
Pinyon Plain |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Mineral properties, net | 9,338 |  | 9,338 |  | 9,338
Other |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Mineral properties, net | 1,687 |  | 1,687 |  | 1,687
Toliara Project |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Mineral Properties, Gross | $ 180,109 |  | $ 180,109 |  | $ 153,510

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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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