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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Treasury Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Other Comprehensive Loss [Member] | Retained Earnings (Accumulated Deficit) [Member]
--- | --- | --- | --- | --- | --- | ---
BALANCE at Dec. 31, 2012 | $ 611,790 | $ 816 | $ (213,988) | $ 596,826 | $ (4,785) | $ 232,921
BALANCE, shares at Dec. 31, 2012 |  |  | (14,547,000) |  |  |
BALANCE, shares at Dec. 31, 2012 |  | 81,617,000 |  |  |  |
Net income (loss) | (164,263) |  |  |  |  | (164,263)
Foreign currency translation gain | 4,295 |  |  |  | 4,295 |
Unrealized loss on investments | (13) |  |  |  | (13) |
COMPREHENSIVE INCOME (LOSS) | (159,981) |  |  |  |  |
Share-based compensation expense: |  |  |  |  |  |
Stock option plan | 2,308 |  |  | 2,308 |  |
Restricted stock award plan | 4,339 |  |  | 4,339 |  |
Employee stock purchase plan | 52 |  |  | 52 |  |
Common stock issued under: |  |  |  |  |  |
Stock option plan | $ 4 |  |  | 4 |  |
Stock option plan, shares | 1,275 | 1,000 |  |  |  |
Restricted stock award plan | $ (506) | $ (1) | $ (506) | 1 |  |
Restricted stock award plan, shares |  | (131,000) | (172,000) |  |  |
Employee stock purchase plan | $ 994 | $ 4 |  | 990 |  |
Employee stock purchase plan, shares | 400,000 | 403,000 |  |  |  |
Tax effect of options exercised and stock settlements | $ (3,616) |  |  | (3,616) |  |
BALANCE at Dec. 31, 2013 | 455,384 | $ 819 | $ (214,494) | 600,904 | (503) | 68,658
BALANCE, shares at Dec. 31, 2013 |  |  | (14,719,000) |  |  |
BALANCE, shares at Dec. 31, 2013 |  | 81,890,000 |  |  |  |
Net income (loss) | (178,163) |  |  |  |  | (178,163)
Unrealized loss on investments | (350) |  |  |  | (350) |
COMPREHENSIVE INCOME (LOSS) | (178,513) |  |  |  |  |
Share-based compensation expense: |  |  |  |  |  |
Stock option plan | 1,372 |  |  | 1,372 |  |
Restricted stock award plan | 2,865 |  |  | 2,865 |  |
Employee stock purchase plan | 40 |  |  | 40 |  |
Common stock issued under: |  |  |  |  |  |
Stock option plan | $ 612 | $ 2 |  | 610 |  |
Stock option plan, shares | 225,000 | 225,000 | 0 |  |  |
Restricted stock award plan | $ (671) | $ 1 | $ (671) | (1) |  |
Restricted stock award plan, shares |  | 95,000 | (97,000) |  |  |
Employee stock purchase plan | $ 742 | $ 1 |  | 741 |  |
Employee stock purchase plan, shares | 100,000 | 127,000 |  |  |  |
BALANCE at Dec. 31, 2014 | $ 281,933 | $ 823 | $ (215,165) | 606,531 | (853) | (109,403)
BALANCE, shares at Dec. 31, 2014 | (14,815,651) |  | (14,816,000) |  |  |
BALANCE, shares at Dec. 31, 2014 | 82,336,689 | 82,337,000 |  |  |  |
Common stock issued under: |  |  |  |  |  |
Cumulative adjustment for change from cost method investment to equity method investment | $ 102 |  |  |  |  | 102
Net income (loss) | 51,885 |  |  |  |  | 51,885
Unrealized loss on investments | (27) |  |  |  | (27) |
COMPREHENSIVE INCOME (LOSS) | 51,858 |  |  |  |  |
Stock option plan | 442 |  |  | 442 |  |
Restricted stock award plan | 2,385 |  |  | 2,385 |  |
Employee stock purchase plan | 30 |  |  | 30 |  |
Stock option plan | $ 828 | $ 3 |  | 825 |  |
Stock option plan, shares | 303,035 | 303,000 |  |  |  |
Restricted stock award plan | $ (439) | $ 2 | $ (441) |  |  |
Restricted stock award plan, shares |  | 214,000 | (82,000) |  |  |
Employee stock purchase plan | $ 573 | $ 2 |  | 571 |  |
Employee stock purchase plan, shares | 100,000 | 143,000 |  |  |  |
BALANCE at Dec. 31, 2015 | $ 337,610 | $ 830 | $ (215,606) | $ 610,784 | $ (880) | $ (57,518)
BALANCE, shares at Dec. 31, 2015 | (14,897,931) |  | (14,898,000) |  |  |
BALANCE, shares at Dec. 31, 2015 | 82,996,585 | 82,997,000 |  |  |  |

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