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Consolidated Statements Of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Common Stock [Member] | Additional Paid-In Capital [Member] | Accumulated Deficit [Member] | Treasury Stock [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Total
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2017 | $ 3 | $ 485,285 | $ (310,390) | $ (12,415) | $ 499 | $ 162,982
Balance, shares at Dec. 31, 2017 | 32,917 |  |  | (2,875) |  |
Net income (loss) |  |  | 7,301 |  |  | 7,301
Other comprehensive income (loss) |  |  |  |  | (22) | (22)
Cash dividends |  |  | (1,488) |  |  | (1,488)
Purchase of treasury stock, value |  |  |  | $ (5,687) |  | (5,687)
Purchase of treasury stock, shares |  |  |  | (621) |  |
Stock compensation expense |  | 2,652 |  |  |  | 2,652
Proceeds from exercise of options |  | 467 |  |  |  | 467
Proceeds from exercise of options, shares | 327 |  |  |  |  |
Balance at Dec. 31, 2018 | $ 3 | 488,404 | (304,577) | $ (18,102) | 477 | 166,205
Balance, shares at Dec. 31, 2018 | 33,244 |  |  | (3,496) |  |
Net income (loss) |  |  | 18,972 |  |  | 18,972
Other comprehensive income (loss) |  |  |  |  | (780) | (780)
Cash dividends |  |  | (2,987) |  |  | (2,987)
Purchase of treasury stock, value |  |  |  | $ (4,167) |  | (4,167)
Purchase of treasury stock, shares |  |  |  | (359) |  |
Stock compensation expense |  | 2,949 |  |  |  | 2,949
Proceeds from exercise of options |  | 1,000 |  |  |  | 1,000
Proceeds from exercise of options, shares | 371 |  |  |  |  |
Balance at Dec. 31, 2019 | $ 3 | 492,353 | (288,592) | $ (22,269) | (303) | 181,192
Balance, shares at Dec. 31, 2019 | 33,615 |  |  | (3,855) |  |
Net income (loss) |  |  | 5,545 |  |  | 5,545
Other comprehensive income (loss) |  |  |  |  | 803 | 803
Cash dividends |  |  | (1,520) |  |  | (1,520)
Stock dividends ($0.05 per share), value |  | 1,533 | (1,533) |  |  | 1,533
Stock dividends ($0.05 per share), shares | 133 |  |  |  |  |
Purchase of treasury stock, value |  |  |  | $ (1,520) |  | (1,520)
Purchase of treasury stock, shares |  |  |  | (115) |  |
Stock compensation expense |  |  |  |  |  | 6,791
Proceeds from exercise of options |  | 2,152 |  |  |  | 2,152
Proceeds from exercise of options, shares | 306 |  |  |  |  |
Issuance of common stock under stock incentive plans, net, value |  | 6,791 |  |  |  | 6,791
Issuance of common stock under stock incentive plans, net, shares | 244 |  |  |  |  |
Issuance of common stock, net of issuance costs, value | $ 1 | 11,150 |  |  |  | $ 11,151
Issuance of common stock, net of issuance costs, shares | 900 |  |  |  |  | 900,000
Balance at Dec. 31, 2020 | $ 4 | $ 513,979 | $ (286,100) | $ (23,789) | $ 500 | $ 204,594
Balance, shares at Dec. 31, 2020 | 35,198 |  |  | (3,970) |  |

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