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Consolidated statements of stockholder's equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Treasury Stock [Member]
--- | --- | --- | --- | --- | --- | ---
Total stockholders' equity at begining of the year, Value at Dec. 31, 2016 | $ 72,196 | $ 418 | $ 215,134 | $ (116,030) | $ (16,658) | $ (10,668)
Share based payment change in accounting principle | 0 |  | 72 | (72) |  |
Stock option exercises | 190 | 2 | 188 |  |  |
Stock purchase plan, net | 140 |  | 140 |  |  |
Shares withheld for taxes | (243) | (1) | (242) |  |  |
Stock compensation expense | 3,500 |  | 3,500 |  |  |
Net income (loss) | (865) |  |  | (865) |  |
Other comprehensive loss | 5,982 |  |  |  | 5,982 |
Total stockholders' equity at year end, Value at Dec. 31, 2017 | $ 80,900 | $ 419 | 218,792 | (116,967) | (10,676) | (10,668)
Beginning balance shares at Dec. 31, 2016 |  | 42,187,000 |  |  |  |
Stock option exercises during the year, Shares | 143,391 | 143,000 |  |  |  |
Stock purchase plan, net, Shares | 76,215 | 76,000 |  |  |  |
Vesting of restricted stock units, Shares |  | 489,000 |  |  |  |
Shares withheld for taxes shares |  | (131,000) |  |  |  |
Ending balance shares at Dec. 31, 2017 |  | 42,764,000 |  |  |  |
Stock option exercises | $ 5,166 | $ 17 | 5,149 |  |  |
Stock purchase plan, net | 160 | 1 | 159 |  |  |
Shares withheld for taxes | (768) | (1) | (767) |  |  |
Stock compensation expense | 3,044 |  | 3,044 |  |  |
Net income (loss) | (2,922) |  |  | (2,922) |  |
Other comprehensive loss | (2,856) |  |  |  | (2,856) |
Total stockholders' equity at year end, Value at Dec. 31, 2018 | $ 82,724 | $ 436 | $ 226,377 | $ (119,889) | $ (13,532) | $ (10,668)
Stock option exercises during the year, Shares | 1,696,255 | 1,696,000 |  |  |  |
Stock purchase plan, net, Shares | 89,308 | 89,000 |  |  |  |
Vesting of restricted stock units, Shares |  | 915,000 |  |  |  |
Shares withheld for taxes shares |  | (340,000) |  |  |  |
Ending balance shares at Dec. 31, 2018 |  | 45,124,000 |  |  |  |

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