CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) $ / shares shares	Mar. 31, 2017 USD ($) $ / shares shares
REVENUE:
Total Revenue	$ 41,285	$ 14,833
COSTS AND EXPENSES:
Property holding costs	1,411	1,188
General and administrative costs	5,187	4,293
Loss (income) from investment in Minera Santa Cruz S.A., net of amortization (note 5)	212	(190)
Depreciation	360	327
Accretion of asset reclamation obligations (note 6)	294	105
Total costs and expenses	45,692	22,266
Operating loss	(4,407)	(7,433)
OTHER (EXPENSE) INCOME:
Interest and other expense	(134)	(68)
Gain on sale of assets		11
Loss on sale of marketable equity securities (note 2)	(734)
Unrealized fair value loss on marketable equity securities (note 2)	(1,137)
Unrealized (loss) gain on derivatives (note 2)	(864)	1,791
Foreign currency gain	927	25
Total other (expense) income	(1,942)	1,759
Loss before income and mining taxes	(6,349)	(5,674)
Income and mining tax recovery (note 7)	1,138	2,656
Net loss	(5,211)	(3,018)
OTHER COMPREHENSIVE (LOSS) INCOME:
Unrealized gain on marketable equity securities, net of taxes		3,875
Comprehensive (loss) income	$ (5,211)	$ 857
Net loss per share (note 10):
Basic (in dollars per share) | $ / shares	$ (0.02)	$ (0.01)
Diluted (in dollars per share) | $ / shares	$ (0.02)	$ (0.01)
Weighted average common shares outstanding (thousands) (note 10):
Basic (in shares) | shares	337,062	299,575
Diluted (in shares) | shares	337,062	299,575
Shareholders' distribution declared per common share (note 8) | $ / shares	0.005	0.005
Gold and silver sales
REVENUE:
Total Revenue	$ 41,041	$ 14,833
Other revenue
REVENUE:
Total Revenue	244
Production costs applicable to sales
COSTS AND EXPENSES:
Cost of goods and services sold	26,394	6,984
Mine development costs
COSTS AND EXPENSES:
Cost of goods and services sold	380	1,115
Exploration costs
COSTS AND EXPENSES:
Cost of goods and services sold	$ 11,454	$ 8,444