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Supplemental Financial Information - Schedule of Other Long Term Assets (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 6 Months Ended
--- | --- | --- | ---
Dec. 27, 2024 | Dec. 31, 2024 | Jun. 30, 2025
Debt Instrument [Line Items] |  |  |
Term of contract |  |  | 15 years
Prepaid expenses and other current assets: |  |  |
Prepaid expenses |  | $ 2,021 | $ 4,309
Prepaid lender fees, net |  | 982 | 1,571
Prepaid income taxes and income tax refunds |  | 233 | 159
Other |  | 1,414 | 1,343
Total prepaid expenses and other current assets |  | 4,650 | 7,382
Other long-term assets, net: |  |  |
Spare parts, net |  | 11,178 | 11,678
Right of use assets, operating leases, net |  | 9,312 | 9,516
Intangible assets, net |  | 7,569 | 7,376
Mine development costs, net |  | 7,010 | 6,851
Upfront Customer Consideration |  | 5,459 | 5,205
Mine reclamation asset, net |  | 1,620 | 1,562
Other |  | 2,581 | 2,601
Total other long-term assets, net |  | $ 44,729 | $ 44,789
Revolving Credit Facility | Secured Debt |  |  |
Debt Instrument [Line Items] |  |  |
Term | 5 years | 5 years |

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