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NON-CONTROLLING INTERESTS (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Aug. 23, 2021 | May 23, 2019 | Dec. 31, 2021
Noncontrolling Interest |  |  |
Stock issued during the period (in shares) |  | 1,935,484 |
McEwen Copper |  |  |
Noncontrolling Interest |  |  |
Percentage of ownership by noncontrolling shareholders |  |  | 18.60%
Percentage of ownership by company before private placement |  |  | 100.00%
Nonredeemable non-controlling interest |  |  | $ 14.8
Contributed Surplus |  |  | $ 25.2
Sale To Related Parties | McEwen Copper |  |  |
Noncontrolling Interest |  |  |
Stock issued during the period (in shares) | 4,000,000 |  |
Share price | $ 10.00 |  |
Gross proceeds from private placement offering | $ 40.0 |  |
Percentage of ownership by noncontrolling shareholders |  |  | 18.60%

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