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SUPPLEMENTAL FINANCIAL INFORMATION (Tables) | 6 Months Ended
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Jun. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Other Nonoperating Income (Expense) | The components of other income are as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
Unrealized gain (loss) on marketable securities | $ | 1 |  |  | $ | 445 |  |  | $ | (851) |  |  | $ | 985 |
Realized gain on maturities of marketable securities | 262 |  |  | 649 |  |  | 450 |  |  | 861 |
Foreign exchange gain (loss) | (93) |  |  | 349 |  |  | (1,516) |  |  | (353) |
Interest income, net and other | 1,336 |  |  | 1,180 |  |  | 1,932 |  |  | 2,747 |
Other income | $ | 1,506 |  |  | $ | 2,623 |  |  | $ | 15 |  |  | $ | 4,240 |
Schedule of Accounts Payable and Accrued Liabilities | The components of accounts payable and accrued liabilities are as follows:
| June 30, 2025 |  | December 31, 2024
Mine closure redundancy | $ | 2,967 |  |  | $ | 9,169 |
Accounts payable | 4,913 |  |  | 7,508 |
Accrued operating expenses | 5,844 |  |  | 6,507 |
Accrued payroll liabilities | 4,093 |  |  | 6,558 |
Accrued capital expenditures | 3,413 |  |  | — |
Accrued taxes | 929 |  |  | 1,673 |
Deferred revenue | — |  |  | 813 |
Total accounts payable and accrued liabilities | $ | 22,159 |  |  | $ | 32,228 |

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- Definition Tabular disclosure of the (a) carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business (accounts payable); (b) other payables; and (c) accrued liabilities. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). An alternative caption includes accrued expenses. + References No definition available. + Details
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- Definition Tabular disclosure of the components of non-operating income or non-operating expense that may include amounts earned from dividends, interest on securities, gains (losses) on securities sold, equity earnings of unconsolidated affiliates, net gain (loss) on sales of business, interest expense and other miscellaneous income or expense items. + References No definition available. + Details
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