CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Revenue:
Sale of metals (Note 15)	$ 4,938				$ 11,321
Costs and expenses:
Costs applicable to sale of metals (exclusive of depreciation shown below) (Note 15)	(6,603)				(14,530)
Exploration expense	(1,816)		(4,320)		(4,212)		(8,006)
El Quevar project expense	(1,174)		(9,114)		(2,589)		(17,851)
Velardena project expense	(2,142)				(5,524)
Administrative expense	(1,829)		(3,864)		(3,853)		(6,103)
Stock based compensation	(291)		(889)		(523)		(2,068)
Reclamation and accretion expense	22				(145)
Other operating income & (expenses), net	(122)		(28)		215		416
Depreciation, depletion and amortization	(1,997)		(474)		(3,843)		(863)
Total costs and expenses	(15,952)		(18,689)		(35,004)		(34,475)
Loss from operations	(11,014)		(18,689)		(23,683)		(34,475)
Other income and expenses:
Interest and other income	1,986		108		2,161		141
Royalty income	219		74		357		130
Gain (loss) on foreign currency	(20)		(68)		434		(214)
Total other income and expenses	2,185		114		2,952		57
Loss from operations before income taxes	(8,829)		(18,575)		(20,731)		(34,418)
Income taxes	1,189		(16)		2,960		(98)
Net loss	(7,640)		(18,591)		(17,771)		(34,516)
Comprehensive loss:
Unrealized loss on securities	(26)		(421)		(59)		(560)
Comprehensive loss	$ (7,666)		$ (19,012)		$ (17,830)		$ (35,076)
Net loss per common share - basic and diluted
Loss - basic (in dollars per share)	$ (0.22)		$ (1.24)		$ (0.50)		$ (2.32)
Loss - diluted (in dollars per share)	$ (0.22)		$ (1.24)		$ (0.50)		$ (2.32)
Weighted average common stock outstanding - basic (in shares)	35,487,868	[1]	14,993,266	[1]	35,480,946	[1]	14,886,137	[1]
Weighted average common stock outstanding - diluted (in shares)	35,487,868	[1]	14,993,266	[1]	35,480,946	[1]	14,886,137	[1]

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