EQUITY METHOD INVESTMENTS - Summary of the operating results of McEwen Copper (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Equity Investments
Advanced projects	$ (2,468)	$ (1,966)	$ (7,912)	$ (4,308)
Foreign currency gain (loss)	62	(23,705)	(333)	(58,818)
Interest and other income	(1,084)	10,331	(3,688)	38,372
Loss before income and mining taxes	(1,267)	(28,617)	(39,578)	(110,873)
Net loss and comprehensive loss attributable to McEwen shareholders	(2,081)	(18,451)	(35,459)	(83,154)
Net loss on investment in McEwen Copper	(3,080)	$ (2,672)	$ (31,929)	$ (7,047)
McEwen Copper Inc.
Equity Investments
Subsidiary (as a percent)			100.00%
Advanced projects	(6,147)		$ (91,877)
Other expenses	(678)		(4,529)
Foreign currency gain (loss)	(308)		(3,990)
Interest and other income	3,295		23,590
Loss before income and mining taxes	(3,838)		(76,806)
Net loss and comprehensive loss attributable to McEwen shareholders	$ (3,838)		$ (76,806)
Subsidiary ownership interest (as a percent)	48.30%		48.30%
Net loss on investment in McEwen Copper	$ (1,852)		$ (36,680)