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INVESTMENTS ACCOUNTED FOR AT FAIR VALUE - Schedule of Fair Value Investments (Details) - USD ($) $ in Thousands | 4 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jan. 23, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2023 | Sep. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Current assets |  | $ 232,695 | $ 135,590 |  |  |
Current liabilities |  | 10,360 | 18,624 |  |  |
Net loss and net loss attributable to the entity |  | 106 | 95 | $ 93 |  |
Consolidated Uranium Inc. |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Current assets |  |  |  |  | $ 7,522 | $ 16,586
Non-current assets |  |  |  |  | 31,717 | 17,437
Current liabilities |  |  |  |  | 3,589 | 2,285
Non-current liabilities |  |  |  |  | $ 319 | 0
Loss from continuing operations |  | (8,817) | (23,103) | (4,253) |  |
Net loss and net loss attributable to the entity |  | $ (8,902) | (17,890) | (4,570) |  |
Virginia Uranium, Inc. |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Current assets | $ 133 |  |  |  |  | 163
Non-current assets | 4,253 |  |  |  |  | 3,753
Current liabilities | 2 |  |  |  |  | 223
Non-current liabilities | 2 |  |  |  |  | $ 2
Loss from continuing operations | $ (226) |  | $ (371) | $ (275) |  |

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