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EQUITY METHOD INVESTMENTS (Details) $ in Thousands, $ in Billions |  |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 24, 2024 USD ($) | Jul. 12, 2024 USD ($) shares | Oct. 31, 2023 USD ($) shares | Oct. 31, 2023 ARS ($) shares | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Oct. 25, 2024 | Jul. 11, 2024 | Oct. 10, 2023 USD ($)
EQUITY METHOD INVESTMENTS |  |  |  |  |  |  |  |  |
Derecognition of cash on the date of deconsolidation |  |  |  |  | $ 45,700 |  |  |  |
Derecognition of investments on the date of deconsolidation |  |  |  |  | 44,200 |  |  |  |
Derecognition of mineral property interests and plant and equipment on the date of deconsolidation |  |  |  |  | 171,900 |  |  |  |
Derecognition of accounts payable and accrued liabilities on the date of deconsolidation |  |  |  |  | 7,900 |  |  |  |
Deconsolidation of McEwen Copper |  |  |  |  | 86,800 |  |  |  |
Deferred tax liability |  |  |  |  | 36,630 | $ 40,572 |  |  |
Gain on deconsolidation of McEwen Copper Inc. (Note 9) |  |  |  |  |  | 222,157 |  |  |
Dilution gain from investments in McEwen Copper Inc. |  |  |  |  | 5,777 |  |  |  |
Nuton LLC | McEwen Copper |  |  |  |  |  |  |  |  |
EQUITY METHOD INVESTMENTS |  |  |  |  |  |  |  |  |
Number of shares sold | shares |  |  | 232,000 | 232,000 |  |  |  |  |
Aggregate purchase price |  |  | $ 6,000 |  |  |  |  |  |
McEwen Copper | Nuton LLC |  |  |  |  |  |  |  |  |
EQUITY METHOD INVESTMENTS |  |  |  |  |  |  |  |  |
Shares issued | shares |  |  | 152,615 | 152,615 |  |  |  |  |
Proceeds from issuance of common stock |  |  | $ 4,000 |  |  |  |  |  |
McEwen Copper | FCA Argentina S.A |  |  |  |  |  |  |  |  |
EQUITY METHOD INVESTMENTS |  |  |  |  |  |  |  |  |
Shares issued | shares |  |  | 1,900,000 | 1,900,000 |  |  |  |  |
Gross proceeds from private placement offering |  |  |  | $ 42 |  |  |  |  |
McEwen Copper Inc. |  |  |  |  |  |  |  |  |
EQUITY METHOD INVESTMENTS |  |  |  |  |  |  |  |  |
Initial carrying amount of the equity investment |  |  |  |  |  |  |  |  | $ 384,000
Deferred tax liability |  |  |  |  |  |  |  |  | $ 37,800
Private placement |  |  |  |  |  |  |  |  |
EQUITY METHOD INVESTMENTS |  |  |  |  |  |  |  |  |
Shares issued | shares |  | 466,667 |  |  |  |  |  |  |
Proceeds from issuance of common stock |  | $ 14,000 |  |  |  |  |  |  |
McEwen Copper |  |  |  |  |  |  |  |  |
EQUITY METHOD INVESTMENTS |  |  |  |  |  |  |  |  |
Percentage of interest acquired |  |  |  |  |  |  |  |  | 47.70%
Deconsolidation of McEwen Copper |  |  |  |  |  | 383,968 |  |  |
Dilution gain from investments in McEwen Copper Inc. |  |  |  |  | $ 5,777 |  |  |  |
McEwen Copper |  |  |  |  |  |  |  |  |
EQUITY METHOD INVESTMENTS |  |  |  |  |  |  |  |  |
Deconsolidation of McEwen Copper |  |  |  |  |  | $ 86,820 |  |  |
Subsidiary ownership interest (as a percent) | 48.30% | 48.30% |  |  | 46.40% |  | 46.40% | 47.70% |
Dilution gain from investments in McEwen Copper Inc. |  |  |  |  | $ 5,800 |  |  |  |
McEwen Copper | Private placement |  |  |  |  |  |  |  |  |
EQUITY METHOD INVESTMENTS |  |  |  |  |  |  |  |  |
Shares issued | shares |  | 166,667 |  |  |  |  |  |  |
Proceeds from issuance of common stock | $ 37,000 | $ 5,000 |  |  |  |  |  |  |
McEwen Copper | Private placement | Nuton LLC |  |  |  |  |  |  |  |  |
EQUITY METHOD INVESTMENTS |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock | $ 35,000 |  |  |  |  |  |  |  |

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