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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, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE
Revenue from gold and silver sales	$ 40,706	$ 18,291	$ 64,446	$ 49,691
Depreciation and depletion	(5,515)	(4,812)	(10,652)	(11,510)
Gross Profit	4,059	(8,875)	(927)	(12,560)
Net income (loss) before tax	(7,011)	(19,844)	(21,492)	(120,129)
Net income (loss)	(5,989)	(19,814)	(18,455)	(119,005)
Income tax recovery	1,022	30	3,037	1,124
Loss from investment in MSC, net of amortization	$ (1,853)	(1,045)	$ (2,427)	(3,721)
Subsidiary (as a percent)			100.00%
Ownership interest (as a percent)	49.00%		49.00%
Other infrequent or unusual expenses		1,968		1,968
MSC
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE
Revenue from gold and silver sales	$ 70,396	47,081	$ 123,699	84,471
Production costs applicable to sales	(40,888)	(30,402)	(77,256)	(58,718)
Depreciation and depletion	(9,779)	(7,650)	(16,732)	(14,977)
Gross Profit	19,729	9,029	29,711	10,776
Exploration	(2,941)	(2,175)	(5,177)	(5,041)
Other expenses	(14,684)	(8,925)	(20,220)	(11,142)
Net income (loss) before tax	2,104	(2,071)	4,314	(5,407)
Current and deferred tax expense	(1,937)	1,884	(3,566)	1,933
Net income (loss)	167	(187)	748	(3,474)
Net income (loss)			366		$ 2,745
Amortization of fair value increments			(3,090)		(5,390)
Income tax recovery			297		$ 1,128
Loss from investment in MSC, net of amortization	(1,853)	(1,045)	(2,427)	(3,721)
Other infrequent or unusual expenses	4,400		11,900
MSC | Equity Method Investment
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE
Net income (loss)	81	(92)	366	(1,703)
Amortization of fair value increments	(2,019)	(1,251)	(3,090)	(2,636)
Income tax recovery	$ 85	$ 298	$ 297	$ 618
Ownership interest (as a percent)	49.00%		49.00%

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Exploration expenses (including prospecting) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells.

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