CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
REVENUE:
Gold and silver sales	$ 11,778	$ 456	$ 35,735	$ 456
Income on investment in Minera Santa Cruz S.A., net of amortization (note 6)	2,040	11,240	252	14,968
Total Revenue	13,818	11,696	35,987	15,424
COSTS AND EXPENSES:
Production costs applicable to sales	7,907	119	26,778	119
Mine operating costs		2,406		8,622
Mine construction costs		4,671		13,306
Mine development costs	747		1,316
Exploration costs	2,575	6,708	22,064	28,565
Property holding costs	2,384	2,147	4,077	4,127
General and administrative	2,496	4,119	10,905	12,935
Acquisition costs		8		1,450
Accretion of asset retirement obligation (note 5)	113	110	347	342
Depreciation	204	266	731	750
Impairment of investment in Minera Santa Cruz S.A. (note 6)			95,878
Impairment of mineral property interests and property and equipment (note 5)	6,287	2,902	34,016	3,081
(Gain) loss on sale of assets (note 5)	(50)	(1,135)	6,741	(1,265)
Total costs and expenses	22,663	22,321	202,853	72,032
Operating loss	(8,845)	(10,625)	(166,866)	(56,608)
OTHER INCOME (EXPENSE):
Interest income	60	16	199	198
Gain on litigation settlement (notes 7 and 12)			560
Loss on sale of marketable equity securities		(70)		(70)
Gain (loss) on sale of gold and silver bullion (note 4)	51	1,233	(223)	3,075
Unrealized loss on gold and silver bullion (note 4)				(359)
Other-than-temporary impairment on marketable equity securities				(1,993)
Foreign currency (loss) gain	(159)	423	(1,094)	469
Total other income (expense)	(48)	1,602	(558)	1,320
Loss before income taxes	(8,893)	(9,023)	(167,424)	(55,288)
Recovery of income taxes	12,157	6,369	31,025	14,919
Net income (loss)	3,264	(2,654)	(136,399)	(40,369)
OTHER COMPREHENSIVE INCOME (LOSS):
Reclassification of unrealized gain on marketable securities disposed of during the period, net of taxes				1,000
Unrealized (loss) gain on available-for-sale securities, net of taxes		(1)	3	(2)
Comprehensive income (loss)	$ 3,264	$ (2,655)	$ (136,396)	$ (39,371)
Net income (loss) per share (note 9):
Basic (in dollars per share)	$ 0.01	$ (0.01)	$ (0.46)	$ (0.16)
Diluted (in dollars per share)	$ 0.01	$ (0.01)	$ (0.46)	$ (0.16)
Weighted average common shares outstanding (thousands) (note 9):
Basic (in shares)	297,125	268,373	297,001	256,834
Diluted (in shares)	297,899	268,373	297,001	256,834