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Unaudited Consolidated Statement of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified | Total | Common Stock | Treasury Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Accumulated Deficit
--- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2013 | $ 249,752 | $ 6 | $ (15,176) | $ 266,122 | $ (359) | $ (841)
Beginning balance, shares at Dec. 31, 2013 |  | 58,266,000 | 5,394,000 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 12,018 |  |  |  |  | 12,018
Other comprehensive loss | (149) |  |  |  | (149) |
Employee stock purchase plan | 231 |  |  | 231 |  |
Employee stock purchase plan, shares |  |  | (8,000) |  |  |
Common stock issued in payment of accrued liability | 600 |  |  | 600 |  |
Common stock issued in payment of accrued liability, shares |  | 27,000 |  |  |  |
Stock warrants exercised | 1,545 |  |  | 1,545 |  |
Stock warrants exercised, shares |  | 1,277,000 |  |  |  |
Stock options exercised | 1,448 |  |  | 1,448 |  |
Stock options exercised, shares |  | 283,000 |  |  |  |
Stock surrendered for exercise of stock options | (1,005) |  | (1,005) |  |  |
Stock surrendered for exercise of stock options, shares |  |  | 39,000 |  |  |
Restricted stock granted | 0 |  |  | 0 |  |
Restricted stock granted, shares |  | 284,000 |  |  |  |
Restricted stock forfeited, shares |  |  | 2,000 |  |  |
Treasury stock acquired related to tax withholding for share-based awards | (4,045) |  | (4,045) |  |  |
Treasury stock acquired related to tax withholding for share-based awards, shares |  |  | 162,000 |  |  |
Excess tax benefit related to share-based awards | 1,300 |  |  | 1,300 |  |
Stock compensation expense | 2,334 |  |  | 2,334 |  |
Stock issued in EOGA acquisition | 1,750 | 0 |  | 1,750 |  |
Stock issued in EOGA acquisition, shares |  | 94,000 |  |  |  |
Ending balance at Mar. 31, 2014 | $ 265,779 | $ 6 | $ (20,226) | $ 275,330 | $ (508) | $ 11,177
Ending balance, shares at Mar. 31, 2014 |  | 60,231,000 | 5,589,000 |  |  |

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