OPERATING SEGMENT REPORTING - Summary of Reportable Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating Segment Reporting
Revenue	$ 41,228	$ 34,752
Depreciation and depletion	(10,107)	(6,896)
Gross profit (loss)	6,011	4,443
Advanced projects	(2,454)	(33,560)
Income (Loss) from equity investments	(16,734)	(3,461)
Segment income (loss)	(17,048)	(38,478)
General and Administrative and other	(5,892)	1,532
Loss before income and mining taxes	(22,940)	(36,946)
Capital expenditures	4,522	6,718
USA
Operating Segment Reporting
Depreciation and depletion	(6,037)	(1,260)
Gross profit (loss)	5,973	986
Advanced projects		(289)
Segment income (loss)	4,891	(76)
Capital expenditures	929	2,991
Canada
Operating Segment Reporting
Depreciation and depletion	(4,070)	(5,636)
Gross profit (loss)	(1,162)	3,457
Segment income (loss)	(3,951)	(1,283)
Capital expenditures	2,780	2,773
Mexico
Operating Segment Reporting
Gross profit (loss)	1,200
Advanced projects	(2,454)	(1,391)
Segment income (loss)	(1,254)	(1,391)
Capital expenditures	813
MSC
Operating Segment Reporting
Income (Loss) from equity investments	1,278	(3,461)
Segment income (loss)	1,278	(3,461)
McEwen Copper
Operating Segment Reporting
Advanced projects		(31,880)
Income (Loss) from equity investments	(18,012)
Segment income (loss)	(18,012)	(32,267)
Capital expenditures		954
Gold and silver sales
Operating Segment Reporting
Revenue	41,228	34,752
Gold and silver sales | USA
Operating Segment Reporting
Revenue	25,278	11,587
Gold and silver sales | Canada
Operating Segment Reporting
Revenue	14,750	23,165
Gold and silver sales | Mexico
Operating Segment Reporting
Revenue	1,200
Production costs applicable to sales
Operating Segment Reporting
Production costs applicable to sales	(25,110)	(23,413)
Production costs applicable to sales | USA
Operating Segment Reporting
Production costs applicable to sales	(13,268)	(9,341)
Production costs applicable to sales | Canada
Operating Segment Reporting
Production costs applicable to sales	(11,842)	(14,072)
Exploration
Operating Segment Reporting
Production costs applicable to sales	(3,871)	(5,900)
Exploration | USA
Operating Segment Reporting
Production costs applicable to sales	(1,082)	(773)
Exploration | Canada
Operating Segment Reporting
Production costs applicable to sales	$ (2,789)	(4,740)
Exploration | McEwen Copper
Operating Segment Reporting
Production costs applicable to sales		$ (387)