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Consolidated Statements of Stockholders' Equity (Unaudited) (USD $) In Thousands | Total | Common Stock | Additional Paid-In Capital | Accumulated Deficit | Accumulated Other Comprehensive Gain | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
Balance, value at Dec. 31, 2012 | $ 266,678 | $ 512 | $ 1,166,605 | $ (899,832) | $ 23 | $ (630)
Balance, shares at Dec. 31, 2012 |  | 512,375 |  |  |  |
Stock-based compensation | 5,728 | 0 | 5,728 | 0 | 0 | 0
Issuance of common stock under Equity Incentive Plans, shares |  | 1,900 |  |  |  |
Issuance of common stock under Equity Incentive Plans, value | 874 | 2 | 872 | 0 | 0 | 0
Repurchase of common stock | (873) | 0 | 0 | 0 | 0 | (873)
Net loss | (86,712) | 0 | 0 | (86,712) | 0 | 0
Unrealized gain on investments | 15 | 0 | 0 | 0 | 15 | 0
Balance, value at Sep. 30, 2013 | 185,710 | 514 | 1,173,205 | (986,544) | 38 | (1,503)
Balance, shares at Sep. 30, 2013 |  | 514,275 |  |  |  |
Balance, value at Dec. 31, 2013 | 170,163 | 514 | 1,175,108 | (1,003,958) | 2 | (1,503)
Balance, shares at Dec. 31, 2013 |  | 514,349 |  |  |  |
Stock-based compensation | 5,584 | 0 | 5,584 | 0 | 0 | 0
Issuance of common stock under Equity Incentive Plans, shares |  | 1,767 |  |  |  |
Issuance of common stock under Equity Incentive Plans, value | 325 | 2 | 323 | 0 | 0 | 0
Repurchase of common stock | (887) | 0 | 0 | 0 | 0 | (887)
Net loss | (97,361) | 0 | 0 | (97,361) | 0 | 0
Unrealized gain on investments | 0 |  |  |  |  |
Balance, value at Sep. 30, 2014 | $ 77,824 | $ 516 | $ 1,181,015 | $ (1,101,319) | $ 2 | $ (2,390)
Balance, shares at Sep. 30, 2014 |  | 516,116 |  |  |  |

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