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INVENTORIES (Tables) | 9 Months Ended
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Sep. 30, 2024
Inventory Disclosure [Abstract] |
Schedule of Inventories | The Company’s inventories consisted of the following:
| September 30, 2024 |  | December 31, 2023
(in thousands) |
Raw materials and supplies, including spare parts(1) | $ | 46,138 |  |  | $ | 42,371 |
Mined ore stockpiles | 30,300 |  |  | 28,507 |
Work in process | 24,695 |  |  | 15,019 |
Finished goods | 15,566 |  |  | 9,285 |
Total current inventories | 116,699 |  |  | 95,182 |
Add: Non-current portion(2) | 19,825 |  |  | 13,350 |
Total inventories | $ | 136,524 |  |  | $ | 108,532 |
(1)Includes raw materials to support activities pertaining to the Company’s rare earth metal, alloy and magnet manufacturing capabilities. (2)Primarily represents stockpiled ore that is not expected to be processed within the next 12 months as well as certain raw materials that are not expected to be consumed within the next 12 months. The stockpiled ore amounts as of September 30, 2024 and December 31, 2023, were $12.0 million and $9.1 million, respectively.
Schedule of Noncurrent Inventories | The Company’s inventories consisted of the following:
| September 30, 2024 |  | December 31, 2023
(in thousands) |
Raw materials and supplies, including spare parts(1) | $ | 46,138 |  |  | $ | 42,371 |
Mined ore stockpiles | 30,300 |  |  | 28,507 |
Work in process | 24,695 |  |  | 15,019 |
Finished goods | 15,566 |  |  | 9,285 |
Total current inventories | 116,699 |  |  | 95,182 |
Add: Non-current portion(2) | 19,825 |  |  | 13,350 |
Total inventories | $ | 136,524 |  |  | $ | 108,532 |
(1)Includes raw materials to support activities pertaining to the Company’s rare earth metal, alloy and magnet manufacturing capabilities. (2)Primarily represents stockpiled ore that is not expected to be processed within the next 12 months as well as certain raw materials that are not expected to be consumed within the next 12 months. The stockpiled ore amounts as of September 30, 2024 and December 31, 2023, were $12.0 million and $9.1 million, respectively.

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- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483489/210-10-50-1 + Details
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