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MARKETABLE SECURITIES - Activity in Investments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Investments rollforward |  |  |
Opening balance | $ 1,743 | $ 1,295 | $ 1,806
Additions/transfers during year | 366 | 34,157 |
Disposals/transfers during year | (778) | (162) |
Unrealized (loss) gain on securities held | 286 | 10,684 | (511)
McEwen Copper deconsolidation |  | (44,231) |
Ending balance | 1,617 | 1,743 | 1,295
Marketable securities |  |  |
Investments rollforward |  |  |
Opening balance | 1,743 | 1,133 | 1,644
Additions/transfers during year | 243 | 34,157 |
Disposals/transfers during year | (778) |  |
Unrealized (loss) gain on securities held | (2) | 10,684 | (511)
McEwen Copper deconsolidation |  | (44,231) |
Ending balance | 1,206 | 1,743 | 1,133
Warrants |  |  |
Investments rollforward |  |  |
Opening balance |  | 162 | 162
Additions/transfers during year | 123 |  |
Disposals/transfers during year |  | $ (162) |
Unrealized (loss) gain on securities held | 288 |  |
Ending balance | $ 411 |  | $ 162

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