NON-CONTROLLING INTERESTS (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 21, 2022	Aug. 23, 2021	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Noncontrolling Interest
Issuance of equity by subsidiary (Note 18)			$ 14,500			$ 14,500
Net loss			(12,406)		$ (5,989)	(33,470)	$ (18,455)
Noncontrolling Interest
Noncontrolling Interest
Issuance of equity by subsidiary (Note 18)			7,593			7,593		$ 14,900
Net loss			$ 46			(288)
Additional Paid-in Capital
Noncontrolling Interest
Issuance of equity by subsidiary (Note 18)						$ 7,400		$ 25,100
McEwen Copper
Noncontrolling Interest
Percentage of ownership by noncontrolling shareholders			5.31%			5.31%
Percentage of ownership by company before private placement						81.40%		100.00%
McEwen Copper | Noncontrolling Interest
Noncontrolling Interest
Percentage of ownership by noncontrolling shareholders			23.91%			23.91%
Series B Private Placement Offering - Tranche One | McEwen Copper
Noncontrolling Interest
Sale of flow-through common stock (in shares)		4,000,000
Share price		$ 10.00
Gross proceeds from private placement offering		$ 40,000
Percentage of ownership by noncontrolling shareholders			18.60%			18.60%
Series B Private Placement Offering - Tranche One | McEwen Copper | Affiliate of Robert McEwen
Noncontrolling Interest
Percentage of ownership by noncontrolling shareholders		18.60%						18.60%
Series B Private Placement Offering - Tranche Two | McEwen Copper
Noncontrolling Interest
Sale of flow-through common stock (in shares)	1,500,000
Share price	$ 10.00
Gross proceeds from private placement offering	$ 15,000			$ 300				$ 2,550
Series B Private Placement Offering - Tranche Two | McEwen Copper | Affiliate of Robert McEwen
Noncontrolling Interest
Percentage of ownership by noncontrolling shareholders			17.39%			17.39%