INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE - Summary of Operating Results from MSC (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE
Revenue from gold and silver sales	$ 30,647	$ 40,706	$ 56,189	$ 64,446
Depreciation and depletion	(3,469)	(5,515)	(7,181)	(10,652)
Gross Profit	4,235	4,059	(1,759)	(927)
Net income before tax	(12,406)	(7,011)	(34,285)	(21,492)
Net income (loss)	(12,452)	(5,989)	(33,182)	(18,455)
Income tax recovery		1,022	815	3,037
Income (loss) from investment in MSC, net of amortization	$ 2,511	(1,853)	$ 1,391	(2,427)
Subsidiary (as a percent)			100.00%
Ownership interest (as a percent)	100.00%		100.00%
Subsidiary of Common Parent [Member]
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE
Ownership interest (as a percent)	49.00%		49.00%
Minera Santa Cruz S.A. [Member]
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE
Income (loss) from investment in MSC, net of amortization	$ 2,511	(1,853)	$ 1,391	(2,427)
Minera Santa Cruz S.A. [Member] | Subsidiary of Common Parent [Member]
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE
Net income (loss)	3,436	81	2,805	366
Amortization of fair value increments	(1,088)	(2,019)	(1,700)	(3,090)
Income tax recovery	163	85	286	297
Income (loss) from investment in MSC, net of amortization	$ 2,511	(1,853)	$ 1,391	(2,427)
Ownership interest (as a percent)	76.00%		76.00%
Minera Santa Cruz S.A. [Member]
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE
Revenue from gold and silver sales	$ 70,827	70,396	$ 111,530	123,699
Production costs applicable to sales	(45,959)	(40,888)	(81,302)	(77,256)
Depreciation and depletion	(5,357)	(9,779)	(12,253)	(16,732)
Gross Profit	19,511	19,729	17,975	29,711
Exploration	(3,093)	(2,941)	(4,828)	(5,177)
Other expenses	(8,529)	(14,684)	(10,351)	(20,220)
Net income before tax	7,889	2,104	2,796	4,314
Current and deferred tax expense	(877)	(1,937)	2,929	(3,566)
Net income (loss)	$ 7,012	$ 167	5,725	$ 748
Net income (loss)			2,805		$ 132
Amortization of fair value increments			(1,700)		(8,331)
Income tax recovery			$ 286		$ 666