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MINERAL PROPERTIES AND PROPERTY, PLANT AND EQUIPMENT (Tables) | 12 Months Ended
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Dec. 31, 2024
Property, Plant and Equipment [Abstract] |
Schedule of Property, Plant and Equipment | Property, Plant and Equipment The following is a summary of property, plant and equipment, net:
| Estimated |  | December 31,
| Useful Lives |  | 2024 |  | 2023
Land | N/A |  | $ | 1,015 |  |  | $ | 642 |
Plant facilities | 12 - 15 years |  | 63,537 |  |  | 29,750 |
Mining equipment | 5 - 10 years |  | 22,187 |  |  | 13,019 |
Light trucks and utility vehicles | 5 years |  | 4,081 |  |  | 3,256 |
Office furniture and equipment | 4 - 7 years |  | 1,918 |  |  | 1,754 |
Construction-in-progress(1) | N/A |  | 3,187 |  |  | 13,627 |
Total property, plant and equipment |  |  | $ | 95,925 |  |  | $ | 62,048 |
Less: accumulated depreciation |  |  | (40,738) |  |  | (35,925) |
Property, plant and equipment, net |  |  | $ | 55,187 |  |  | $ | 26,123 |
(1) Costs incurred for commissioning activities for the Company's Phase 1 REE separation circuit at the Mill are capitalized. The Company will offset these costs upon sale of separated neodymium-praseodymium (“NdPr") that is produced during commissioning of the Phase 1 REE separation circuit. The Company's Phase 1 REE separation circuit was placed into service on October 1, 2024.
Schedule of Summary of Mineral Properties | The following is a summary of mineral properties:
| December 31,
| 2024 |  | 2023
Toliara Project | $ | 153,510 |  |  | $ | — |
Sheep Mountain | 34,183 |  |  | 34,183 |
Bahia Project | 32,613 |  |  | 29,130 |
Nichols Ranch ISR Project | 25,974 |  |  | 25,974 |
Roca Honda | 22,095 |  |  | 22,095 |
Pinyon Plain | 9,338 |  |  | 6,512 |
Other | 1,687 |  |  | 1,687 |
Total mineral properties | $ | 279,400 |  |  | $ | 119,581 |
Less: accumulated depletion | (1,070) |  |  | — |
Mineral properties, net | $ | 278,330 |  |  | $ | 119,581 |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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