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CASH, CASH EQUIVALENTS AND RESTRICTED CASH (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Cash and cash equivalents $ 54,287 $ 20,843    
Restricted cash - current 2,550      
Restricted cash - non-current 3,797 3,595    
Total cash, cash equivalents, and restricted cash 60,634 $ 24,438 $ 46,500 $ 30,489
McEwen Copper Inc.        
Total cash, cash equivalents, and restricted cash $ 37,300