CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE (LOSS) INCOME shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) $ / shares shares	Sep. 30, 2017 USD ($) $ / shares shares	Sep. 30, 2018 USD ($) $ / shares shares	Sep. 30, 2017 USD ($) $ / shares shares
REVENUE:
Total Revenue	$ 26,896	$ 13,430	$ 102,360	$ 43,373
OTHER OPERATING EXPENSES:
Gross profit	6,576	4,781	31,390	19,180
Property holding	1,975	1,979	3,575	3,590
General and administrative	4,576	4,734	15,577	13,105
Loss (income) from investment in Minera Santa Cruz S.A. (note 5)	4,973	462	7,450	535
Depreciation	279	316	912	1,125
Revision of estimates and accretion of asset reclamation obligations (note 6)	314	320	896	541
Total other operating expenses	21,782	11,549	59,726	35,999
Operating loss	(15,206)	(6,768)	(28,336)	(16,819)
OTHER INCOME (EXPENSE):
Interest and other expense	(832)	(303)	(612)	(478)
(Loss) gain on sale of assets			(99)	11
(Loss) gain on sale of marketable equity securities (note 2)			(767)	840
Unrealized fair value loss on marketable securities (note 2)	(158)		(1,795)
Other-than-temporary impairment on marketable equity securities (note 2)		(356)		(356)
Unrealized gain (loss) on derivatives (note 2)	134	(933)	(731)	136
Foreign currency gain (loss)	1,159	(276)	3,568	799
Total other income (expense)	303	(1,868)	(436)	952
Loss before income and mining taxes	(14,903)	(8,636)	(28,772)	(15,867)
Income and mining tax recovery (note 7)	1,613	564	4,891	3,067
Net loss	(13,290)	(8,072)	(23,881)	(12,800)
OTHER COMPREHENSIVE LOSS:
Reclassification of unrealized gain on marketable securities disposed of during the period, net of taxes (note 2)				(840)
Other-than-temporary impairment on marketable equity securities (note 2)		356		356
Unrealized (loss) gain on marketable equity securities, net of taxes		(1,573)		2,066
Comprehensive loss	$ (13,290)	$ (9,289)	$ (23,881)	$ (11,218)
Net loss per share (note 10):
Basic (in dollars per share) | $ / shares	$ (0.04)	$ (0.03)	$ (0.07)	$ (0.04)
Diluted (in dollars per share) | $ / shares	(0.04)	(0.03)	(0.07)	(0.04)
Basic and Diluted (in dollars per share) | $ / shares	$ (0.04)	$ (0.03)	$ (0.07)	$ (0.04)
Weighted average common shares outstanding (thousands) (note 10):
Basic (in shares) | shares	337,100	314,077	337,083	307,445
Diluted (in shares) | shares	337,100	314,077	337,083	307,445
Basic and Diluted (in shares) | shares	337,100	314,077	337,083	307,445
Shareholders' distribution declared per common share (note 8) | $ / shares	0.005	0.005	0.010	0.010
Gold and silver sales
REVENUE:
Total Revenue	$ 26,896	$ 13,430	$ 101,743	$ 43,373
Other revenue
REVENUE:
Total Revenue			617
Production costs applicable to sales
OTHER OPERATING EXPENSES:
Cost of goods and services sold	20,320	8,649	70,970	24,193
Mine development
OTHER OPERATING EXPENSES:
Cost of goods and services sold	1,505	1,382	2,595	3,217
Exploration
OTHER OPERATING EXPENSES:
Cost of goods and services sold	$ 8,160	$ 2,356	$ 28,721	$ 13,886