CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($) $ / shares shares	Jun. 30, 2016 USD ($) $ / shares shares	Jun. 30, 2017 USD ($) $ / shares shares	Jun. 30, 2016 USD ($) $ / shares shares
REVENUE:
Gold and silver sales	$ 15,110	$ 14,613	$ 29,943	$ 35,803
Total Revenue	15,110	14,613	29,943	35,803
COSTS AND EXPENSES:
Production costs applicable to sales	8,560	5,763	15,544	14,830
Mine development costs	720	1,316	1,835	2,014
Exploration costs	3,086	1,689	11,530	3,429
Property holding costs	423	258	1,611	1,405
General and administrative	4,078	2,600	8,371	5,368
Depreciation	482	258	809	497
Revision of estimates and accretion of asset reclamation obligations (note 6)	116	133	221	257
Loss (income) from investment in Minera Santa Cruz S.A., net of amortization (note 5)	263	(4,133)	73	(9,096)
Total costs and expenses	17,728	7,884	39,994	18,704
Operating (loss) income	(2,618)	6,729	(10,051)	17,099
OTHER INCOME (EXPENSE):
Interest and other (expense) income:	(109)	(73)	(175)	155
Gain on sale of assets			11
Gain on sale of marketable equity securities (note 2)	840		840	22
Other-than-temporary impairment on marketable equity securities (note 2)		(597)	0	(882)
Unrealized (loss) gain on derivatives (note 2)	(722)	1,719	1,069	1,719
Foreign currency gain (loss)	1,050	(281)	1,075	502
Total other income	1,059	768	2,820	1,516
(Loss) Income before income taxes	(1,559)	7,497	(7,231)	18,615
Income tax (expense) recovery (note 7)	153	(856)	(2,503)	(2,723)
Net (loss) income	(1,712)	8,353	(4,728)	21,338
OTHER COMPREHENSIVE (LOSS) INCOME:
Reclassification of unrealized gain on marketable securities disposed of during the period, net of taxes	(840)		(840)
Other-than-temporary impairment on marketable equity securities (note 2)		597		882
Unrealized (loss) gain on available-for-sale securities, net of taxes	(236)	1,624	3,639	1,500
Comprehensive (loss) income	$ (2,788)	$ 10,574	$ (1,929)	$ 23,720
Net (loss) income per share (note 10):
Basic (in dollars per share) | $ / shares	$ (0.01)	$ 0.03	$ (0.02)	$ 0.07
Diluted (in dollars per share) | $ / shares	$ (0.01)	$ 0.03	$ (0.02)	$ 0.07
Weighted average common shares outstanding (thousands) (note 10):
Basic (in shares) | shares	308,523	298,237	304,074	298,239
Diluted (in shares) | shares	308,523	299,791	304,074	299,231
Return of capital distribution declared per common share (note 8) | $ / shares	0.005	0.005	0.005	0.005