CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenue:
Sale of metals (Note 15)		$ 1,961		$ 4,298
Costs and expenses:
Costs applicable to sale of metals (exclusive of depreciation shown below) (Note 15)		(2,775)		(5,787)
Exploration expense		(1,267)	$ (1,653)	(2,236)	$ (3,253)
El Quevar project expense		(405)	(421)	(811)	(755)
Velardena project expense				(119)
Velardena shutdown and care & maintenance costs			(1,208)		(2,457)
Administrative expense		(1,000)	(1,150)	(2,328)	(2,805)
Stock based compensation		(94)	(257)	(273)	(587)
Reclamation and accretion expense		(48)	(49)	(158)	(98)
Other operating income, net		294	2	470	4
Depreciation, depletion and amortization		(1,175)	(778)	(2,534)	(1,624)
Total costs and expenses		(6,470)	(5,514)	(13,776)	(11,575)
Loss from operations		(4,509)	(5,514)	(9,478)	(11,575)
Other income and (expense):
Interest and other income, net (Note 16)		467	487	1,383	881
Warrant derivative gain (Note 17)		218		868
(Loss) gain on foreign currency		(26)	(16)	(54)	(7)
Total other income		659	471	2,197	874
Loss from operations before income taxes		(3,850)	(5,043)	(7,281)	(10,701)
Income tax benefit				0	0
Net loss		(3,850)	(5,043)	(7,281)	(10,701)
Comprehensive loss, net of tax:
Unrealized gain (loss) on securities		43		(37)
Comprehensive loss		$ (3,807)	$ (5,043)	$ (7,318)	$ (10,701)
Net loss per common share - basic
Loss (in dollars per share)		$ (0.07)	$ (0.12)	$ (0.14)	$ (0.25)
Weighted average common stock outstanding - basic (1) (in shares)	[1]	52,688,552	42,918,426	52,688,552	42,906,090

[1] Potentially dilutive shares have not been included because to do so would be anti-dilutive.