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Consolidated Statements of Stockholders' Equity (USD $) In Thousands, unless otherwise specified | Total | Common Stock | Additional Paid-in Capital | Treasury Stock | Accumulated Deficit | Accumulated Other Comprehensive Income (Loss)
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2009 | $ 216,399 | $ 104 | $ 488,321 | $ (1,218) | $ (275,947) | $ 5,139
Balance (in shares) at Dec. 31, 2009 |  | 104,212 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income (loss) | (17,573) |  |  |  | (17,573) |
Foreign currency translation adjustments | 1,384 |  |  |  |  | 1,384
Change in pension | (291) |  |  |  |  | (291)
Exercise of stock options | 553 | 1 | 552 |  |  |
Exercise of stock options (in shares) |  | 704 |  |  |  |
Issuance of shares under Employee Stock Purchase Plan | 638 | 1 | 637 |  |  |
Issuance of shares under Employee Stock Purchase Plan (in shares) |  | 280 |  |  |  |
Issuance of restricted common shares | (201) |  | (201) |  |  |
Issuance of restricted common shares (in shares) |  | 262 |  |  |  |
Issuance of restricted shares in satisfaction of accrued compensation | 570 |  | 570 |  |  |
Issuance of restricted shares in satisfaction of accrued compensation (in shares) |  | 448 |  |  |  |
Stock-based compensation expense | 4,088 |  | 4,088 |  |  |
Balance at Dec. 31, 2010 | 205,567 | 106 | 493,967 | (1,218) | (293,520) | 6,232
Balance (in shares) at Dec. 31, 2010 |  | 105,906 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income (loss) | 5,077 |  |  |  | 5,077 |
Foreign currency translation adjustments | (1,465) |  |  |  |  | (1,465)
Change in pension | 10 |  |  |  |  | 10
Exercise of stock options | 288 |  | 288 |  |  |
Exercise of stock options (in shares) |  | 372 |  |  |  |
Issuance of shares under Employee Stock Purchase Plan | 503 | 1 | 502 |  |  |
Issuance of shares under Employee Stock Purchase Plan (in shares) |  | 398 |  |  |  |
Issuance of restricted common shares | (112) |  | (112) |  |  |
Issuance of restricted common shares (in shares) |  | 133 |  |  |  |
Stock-based compensation expense | 4,687 |  | 4,687 |  |  |
Balance at Dec. 31, 2011 | 214,555 | 107 | 499,332 | (1,218) | (288,443) | 4,777
Balance (in shares) at Dec. 31, 2011 |  | 106,809 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income (loss) | (34,034) |  |  |  | (34,034) |
Foreign currency translation adjustments | 642 |  |  |  |  | 642
Change in pension | (399) |  |  |  |  | (399)
Exercise of stock options | 968 | 1 | 967 |  |  |
Exercise of stock options (in shares) |  | 1,148 |  |  |  |
Issuance of shares under Employee Stock Purchase Plan | 390 |  | 390 |  |  |
Issuance of shares under Employee Stock Purchase Plan (in shares) |  | 306 |  |  |  |
Issuance of restricted common shares | (22) |  | (22) |  |  |
Issuance of restricted common shares (in shares) |  | 30 |  |  |  |
Stock-based compensation expense | 3,976 |  | 3,976 |  |  |
Balance at Dec. 31, 2012 | $ 186,076 | $ 108 | $ 504,643 | $ (1,218) | $ (322,477) | $ 5,020
Balance (in shares) at Dec. 31, 2012 |  | 108,293 |  |  |  |

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