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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows (used in) from operating activities:
Cash paid to suppliers and employees	$ (16,512)	$ (9,254)
Interest received	125	9
Cash used in operating activities	(16,387)	(9,245)
Cash flows (used in) provided by investing activities:
Cash and short-term investments received from acquisition of Minera Andes Inc.	36,337
Short-term investments (net)	838
Acquisition of mineral property interests	(392)	(226)
Additions to property and equipment	(1,274)	(396)
Proceeds from disposal of property and equipment	2	23
Investment in gold and silver bullion		(30,169)
Proceeds from sale of gold and silver bullion	6,296	2,173
Cash provided by (used in) investing activities	41,807	(28,595)
Cash flows from financing activities:
Sale of common stock for cash, net of issuance costs		105,415
Exercise of stock options and warrants	2,515	280
Cash provided by financing activities	2,515	105,695
Effect of exchange rate change on cash and cash equivalents	(218)	368
Increase in cash and cash equivalents	27,717	68,223
Cash and cash equivalents, beginning of period	13,416	6,818
Cash and cash equivalents, end of period	41,133	75,041
Reconciliation of net loss to cash used in operating activities:
Net loss	(19,202)	(8,734)
Adjustments to reconcile net loss from operating activities:
Income on investment in Minera Santa Cruz S.A.	(1,198)
Deferred income taxes	(2,273)
Gain on sale of gold and silver bullion	(1,408)	(524)
(Gain) loss on disposal of property and equipment	(2)	(10)
Stock-based compensation	1,573	471
Accretion of asset retirement obligation	112	129
Depreciation	221	120
Foreign exchange loss (gain)	218	(368)
Change in non-cash working capital items:
Increase in other assets related to operations	(2,020)	(1,153)
Dividend receivable obtained from acquisition of Minera Andes Inc.	9,363
(Increase) decrease in liabilities related to operations	(1,771)	824
Cash used in operating activities	$ (16,387)	$ (9,245)

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