INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE - Summary of Operating Results from MSC (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE
Revenue from gold and silver sales	$ 25,988	$ 37,129	$ 82,177	$ 101,575
Depreciation and depletion	(4,313)	(6,025)	(11,494)	(16,677)
Net income before tax	(11,066)	(18,242)	(45,351)	(39,734)
Net income (loss)	(10,530)	(17,401)	(43,712)	(35,856)
Income tax recovery	524	841	1,339	3,878
Income (loss) from investment in MSC, net of amortization	$ 758	$ (2,650)	$ 2,149	$ (5,077)
Subsidiary (as a percent)	100.00%	100.00%	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%	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	$ 758	$ (2,650)	$ 2,149	$ (5,077)
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)	1,804	(273)	4,610	93
Amortization of fair value increments	(1,228)	(2,481)	(2,929)	(5,571)
Income tax recovery	182	104	468	401
Income (loss) from investment in MSC, net of amortization	$ 758	(2,650)	$ 2,149	(5,077)
Ownership interest (as a percent)	68.00%		68.00%
Minera Santa Cruz S.A. [Member]
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE
Revenue from gold and silver sales	$ 65,278	72,098	$ 176,808	195,797
Production costs applicable to sales	(48,930)	(47,911)	(130,231)	(125,167)
Depreciation and depletion	(9,376)	(11,690)	(21,629)	(28,422)
Gross profit	6,972	12,498	24,948	42,209
Exploration	(1,960)	(2,710)	(6,788)	(7,887)
Other expenses	(5,648)	(8,010)	(16,000)	(28,231)
Net income before tax	(636)	1,777	2,160	6,091
Current and deferred tax expense	4,318	(2,336)	7,247	(5,902)
Net income (loss)	$ 3,682	$ (559)	9,407	$ 189
Net income (loss)			4,610		$ 132
Amortization of fair value increments			(2,929)		(8,331)
Income tax recovery			$ 468		$ 666