Summary of Significant Accounting Policies - Segments (Details) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
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Sep. 30, 2025
USD ($)
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Sep. 30, 2024
USD ($)
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Sep. 30, 2025
USD ($)
segment
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Sep. 30, 2024
USD ($)
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| Summary of Significant Accounting Policies | ||||
| Number of reportable segments | segment | 1 | |||
| Sales | $ 6,323 | $ 6,400 | $ 16,758 | $ 11,053 |
| Lost Creek product costs | 7,063 | 4,891 | 15,460 | 8,018 |
| Lower of cost or NRV adjustments | 722 | 2,696 | 2,061 | |
| Cost of sales | 7,063 | 5,613 | 18,156 | 10,079 |
| Gross profit (loss) | (740) | 787 | (1,398) | 974 |
| Exploration and evaluation | 1,477 | 934 | 3,682 | 2,862 |
| Development | 14,379 | 10,088 | 38,184 | 31,730 |
| General and administration | 2,871 | 1,397 | 7,243 | 5,418 |
| Accretion of asset retirement obligations | 344 | 231 | 902 | 518 |
| Operating costs | 19,071 | 12,650 | 50,011 | 40,528 |
| Operating profit (loss) | (19,811) | (11,863) | (51,409) | (39,554) |
| Interest income | 518 | 1,263 | 2,086 | 2,495 |
| Interest expense | (364) | (43) | (920) | (207) |
| Mark to market gain (loss) | (7,854) | 2,968 | (9,166) | 4,442 |
| Foreign exchange gain (loss) | 5 | 6 | (19) | 22 |
| Other income (loss) | 43 | (333) | 111 | (325) |
| Net income (loss) | (27,463) | (8,002) | (59,317) | (33,127) |
| U3O8 sales | ||||
| Summary of Significant Accounting Policies | ||||
| Sales | 6,323 | 6,165 | 16,751 | 10,789 |
| Disposal fees | ||||
| Summary of Significant Accounting Policies | ||||
| Sales | 235 | 7 | 264 | |
| Single operating segment | ||||
| Summary of Significant Accounting Policies | ||||
| Sales | 6,323 | 6,400 | 16,758 | 11,053 |
| Lost Creek product costs | 7,063 | 4,891 | 15,460 | 8,018 |
| Lower of cost or NRV adjustments | 722 | 2,696 | 2,061 | |
| Cost of sales | 7,063 | 5,613 | 18,156 | 10,079 |
| Gross profit (loss) | (740) | 787 | (1,398) | 974 |
| Exploration and evaluation | 1,477 | 934 | 3,682 | 2,862 |
| Development | 14,379 | 10,088 | 38,184 | 31,730 |
| General and administration | 2,871 | 1,397 | 7,243 | 5,418 |
| Accretion of asset retirement obligations | 344 | 231 | 902 | 518 |
| Operating costs | 19,071 | 12,650 | 50,011 | 40,528 |
| Operating profit (loss) | (19,811) | (11,863) | (51,409) | (39,554) |
| Interest income | 518 | 1,263 | 2,086 | 2,495 |
| Interest expense | (364) | (43) | (920) | (207) |
| Mark to market gain (loss) | (7,854) | 2,968 | (9,166) | 4,442 |
| Foreign exchange gain (loss) | 5 | 6 | (19) | 22 |
| Other income (loss) | 43 | (333) | 111 | (325) |
| Net income (loss) | (27,463) | (8,002) | (59,317) | (33,127) |
| Single operating segment | U3O8 sales | ||||
| Summary of Significant Accounting Policies | ||||
| Sales | $ 6,323 | 6,165 | 16,751 | 10,789 |
| Single operating segment | Disposal fees | ||||
| Summary of Significant Accounting Policies | ||||
| Sales | $ 235 | $ 7 | $ 264 | |
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- References No definition available.
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- Definition Amount of gain (loss) from mark to market adjustments for revaluation of warrant liability and uranium inventory loan. No definition available.
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- Definition Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The aggregate cost of goods produced and sold and services rendered during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of capitalized development cost incurred during period and excluded from amortization for oil- and gas-producing activities accounted for under full cost method. Excludes acquisition and exploration costs and capitalized interest. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Exploration expenses (including prospecting) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, before tax, of realized and unrealized gain (loss) from foreign currency transaction. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of interest expense classified as nonoperating. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense. No definition available.
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- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/exampleRef
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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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