Mineral Properties (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Mineral Properties | ||
| Beginning balance | $ 39,380 | $ 34,906 |
| Change in estimated asset retirement costs | 6,372 | 4,861 |
| Depletion and amortization | (1,871) | (387) |
| Ending balance | 43,881 | 39,380 |
| Lost Creek Property | ||
| Mineral Properties | ||
| Beginning balance | 6,812 | 2,466 |
| Change in estimated asset retirement costs | 4,242 | 4,733 |
| Depletion and amortization | (1,871) | (387) |
| Ending balance | 9,183 | 6,812 |
| Shirley Basin Project | ||
| Mineral Properties | ||
| Beginning balance | 17,854 | 17,726 |
| Change in estimated asset retirement costs | 2,130 | 128 |
| Ending balance | 19,984 | 17,854 |
| Other U.S. Properties | ||
| Mineral Properties | ||
| Beginning balance | 14,714 | 14,714 |
| Ending balance | $ 14,714 | $ 14,714 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Mineral properties, net of adjustments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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