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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified | 6 Months Ended
--- | ---
Jun. 30, 2012 | Jun. 30, 2011
Cash flows (used in) from operating activities: |  |
Cash paid to suppliers and employees | $ (42,781) | $ (22,372)
Interest received | 125 | 31
Cash used in operating activities | (42,656) | (22,341)
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) | 3,933 |
Acquisition of mineral property interests | (563) | (792)
Additions to property and equipment | (1,658) | (7,196)
Proceeds from disposal of property and equipment | 53 | 23
Investment in gold and silver bullion |  | (31,299)
Proceeds from sale of gold and silver bullion | 11,330 | 2,173
Increase in restricted investments securing reclamation |  | (413)
Cash provided by (used in) investing activities | 49,432 | (37,504)
Cash flows from financing activities: |  |
Sale of common stock for cash, net of issuance costs |  | 105,415
Exercise of stock options | 3,304 | 773
Cash provided by financing activities | 3,304 | 106,188
Effect of exchange rate change on cash and cash equivalents | (98) | 190
Increase in cash and cash equivalents | 9,982 | 46,533
Cash and cash equivalents, beginning of period | 13,416 | 6,818
Cash and cash equivalents, end of period | 23,398 | 53,351
Reconciliation of net loss to cash used in operating activities: |  |
Net loss | (40,453) | (21,888)
Adjustments to reconcile net loss from operating activities: |  |
Income on investment in Minera Santa Cruz S.A. (net of amortization) | (990) |
Deferred income taxes | (8,550) |
Gain on sale of gold and silver bullion | (1,842) | (524)
Unrealized loss on silver bullion | 359 |
Other-than-temporary impairment on marketable equity securities | 1,993 |
Gain on sale of assets | (130) | (10)
Asset impairments | 179 |
Stock-based compensation | 2,135 | 1,222
Accretion of asset retirement obligation | 232 | 266
Depreciation | 484 | 259
Foreign exchange loss (gain) | 98 | (190)
Change in non-cash working capital items: |  |
Increase in other assets related to operations | (2,810) | (2,311)
Dividend receivable obtained from acquisition of Minera Andes Inc. | 9,363 |
(Increase) decrease in liabilities related to operations | (2,724) | 835
Cash used in operating activities | $ (42,656) | $ (22,341)

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