CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE (LOSS) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
REVENUE:
Revenue	$ 136,541,000	$ 104,789,000	$ 117,019,000
OPERATING EXPENSES:
Depreciation and depletion	(23,798,000)	(22,910,000)	(24,753,000)
Gross profit (loss)	(6,480,000)	(26,948,000)	8,986,000
OTHER OPERATING EXPENSES:
Advanced projects	(12,439,000)	(11,681,000)	(9,520,000)
Exploration	(22,604,000)	(15,861,000)	(37,744,000)
General and administrative	(11,435,000)	(9,201,000)	(12,785,000)
Loss from investment in Minera Santa Cruz S.A. (Note 9)	(7,533,000)	(1,517,000)	(8,754,000)
Depreciation	(339,000)	(405,000)	(566,000)
Reclamation and remediation (Note 12)	(3,450,000)	(1,788,000)	(3,531,000)
Impairment loss on mineral property interests and plant and equipment (Note 8)	0	(83,805,000)
Other operating		(1,968,000)
Total other operating expenses	(57,800,000)	(126,226,000)	(72,900,000)
Operating loss	(64,280,000)	(153,174,000)	(63,914,000)
OTHER INCOME (EXPENSE):
Interest and other finance expenses, net	(6,200,000)	(7,434,000)	(6,817,000)
Other income (Note 4)	6,281,000	6,893,000	7,140,000
Total other income (expense)	81,000	(541,000)	323,000
Loss before income and mining taxes	(64,199,000)	(153,715,000)	(63,591,000)
Income and mining tax recovery	7,315,000	1,390,000	3,844,000
Net loss after income and mining taxes	(56,884,000)	(152,325,000)	(59,747,000)
Net Income (Loss) Attributable to Noncontrolling Interest	172,000
Net loss and comprehensive loss attributable to McEwen shareholders	$ (56,712,000)	$ (152,325,000)	$ (59,747,000)
Net loss per share (Note 13):
Basic (in dollars per share)	$ (0.12)	$ (0.38)	$ (0.17)
Diluted (in dollars per share)	$ (0.12)	$ (0.38)	$ (0.17)
Weighted average common shares outstanding (thousands) (Note 13):
Weighted average common shares outstanding, Basic (shares in thousands)	454,899,000	403,457,000	361,845,000
Weighted average common shares outstanding, Diluted (shares in thousands)	454,899,000	403,457,000	361,845,000
Gold and silver sales
REVENUE:
Revenue	$ 136,541,000	$ 104,789,000	$ 117,019,000
Production costs applicable to sales
OPERATING EXPENSES:
Production costs applicable to sales	$ (119,223,000)	$ (108,827,000)	$ (83,280,000)