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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified | Common Stock | Accumulated Other Comprehensive Income (Loss) | Accumulated Deficit | Total
--- | --- | --- | --- | ---
Balance at Dec. 31, 2012 | $ 1,349,777 | $ (294) | $ (459,892) | $ 889,591
Balance (in shares) at Dec. 31, 2012 | 296,025,000 |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |
Stock-based compensation | 965 |  |  | 965
Exercise of stock options | 171 |  |  | 171
Exercise of stock options (in shares) | 93,000 |  |  |
Shares issued for litigation settlement | 3,270 |  |  | 3,270
Shares issued for litigation settlement (in shares) | 1,000,000 |  |  |
Shares issued for Mexico mining concessions | 96 |  |  | 96
Shares issued for Mexico mining concessions (in shares) | 41,000 |  |  |
Unrealized gain on available-for-sale securities, net of taxes |  | 3 |  | 3
Net loss |  |  | (136,399) | (136,399)
Balance at Sep. 30, 2013 | 1,354,279 | (291) | (596,291) | 757,697
Balance (in shares) at Sep. 30, 2013 | 297,159,000 |  |  |
Balance at Dec. 31, 2013 | 1,354,696 | (295) | (607,634) | 746,767
Balance (in shares) at Dec. 31, 2013 | 297,159,000 |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |
Stock-based compensation | 852 |  |  | 852
Exercise of stock options | 1,382 |  |  | 1,382
Exercise of stock options (in shares) | 697,000 |  |  | 697,300
Shares issued for settlement of accounts payable | 1,004 |  |  | 1,004
Number of shares issued to settle part of account payables (in shares) | 393,190,000 |  |  | 393,190
Unrealized gain on available-for-sale securities, net of taxes |  | 1 |  | 1
Net loss |  |  | (99,168) | (99,168)
Balance at Sep. 30, 2014 | $ 1,357,934 | $ (294) | $ (706,802) | $ 650,838
Balance (in shares) at Sep. 30, 2014 | 298,249,000 |  |  |

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