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EQUITY METHOD INVESTMENTS - Summary of the operating results of McEwen Copper (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Equity Investments |  |  |  |
Advanced projects | $ (2,990) | $ (1,275) | $ (5,444) | $ (2,954)
Foreign exchange income (loss) | 485 | 24,472 | 394 | 35,113
Interest and other income | (1,734) | 19,577 | (2,604) | 28,041
Loss before tax | 15,371 | 45,310 | 38,311 | 82,256
Net income (loss) | 12,995 | 21,627 | 33,378 | 64,703
Net income (loss) on investment in McEwen Copper | (12,115) | $ (914) | $ (28,849) | $ (4,375)
McEwen Copper Inc. |  |  |  |
Equity Investments |  |  |  |
Subsidiary (as a percent) |  |  | 100.00% |
Advanced projects | (37,547) |  | $ (85,730) |
Other expenses | (1,835) |  | (3,851) |
Foreign exchange income (loss) | 310 |  | (3,682) |
Interest and other income | 3,841 |  | 20,295 |
Loss before tax | (35,231) |  | (72,968) |
Net income (loss) | $ (35,231) |  | $ (72,968) |
Subsidiary ownership interest (as a percent) | 47.70% |  | 47.70% |
Net income (loss) on investment in McEwen Copper | $ (16,816) |  | $ (34,828) |

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