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Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Other Comprehensive Income (Loss) | Retained Earnings
--- | --- | --- | --- | --- | ---
Common stock outstanding, beginning (in shares) at Dec. 31, 2013 |  | 8,986,080 |  |  |
Balance at the beginning of the period at Dec. 31, 2013 | $ 70,335 | $ 9 | $ 41,311 | $ 23 | $ 28,992
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Exercise of stock options (in shares) |  | 234,432 |  |  |
Exercise of stock options | $ 1,337 |  | 1,337 |  |
Stock repurchased (in shares) | (272,767) | (272,767) |  |  |
Stock repurchased | $ (2,598) |  |  |  | (2,598)
Cash dividends, $.10 per share | (914) |  |  |  | (914)
Stock issued - Sabine acquisition (in shares) |  | 150,000 |  |  |
Stock issued - Other | 1,679 |  | 1,679 |  |
Tax benefit - stock option exercises | 211 |  | 211 |  |
Stock-based compensation expense | 401 |  | 401 |  |
Employee stock purchase plan (in shares) |  | 82 |  |  |
Employee stock purchase plan | 0 |  | 0 |  |
Unrealized gain on available-for-sale securities, net of tax | 14 |  |  | 14 |
Foreign currency translation adjustment | (45) |  |  | (45) |
Net income | $ 5,596 |  |  |  | 5,596
Common stock outstanding, ending (in shares) at Dec. 31, 2014 | 9,097,827 | 9,097,827 |  |  |
Balance at end of the period at Dec. 31, 2014 | $ 76,016 | $ 9 | 44,939 | (8) | 31,076
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Exercise of stock options (in shares) |  | 56,143 |  |  |
Exercise of stock options | 308 |  | 308 |  |
Cash dividends, $.10 per share | (1,417) |  |  |  | (1,417)
Stock issued - Other | 155 |  | 155 |  |
Tax benefit - stock option exercises | 41 |  | 41 |  |
Stock-based compensation expense | 552 |  | 552 |  |
Stock-based compensation - Dividend Equivalents (in shares) |  | 15,005 |  |  |
Stock-based compensation - Dividend Equivalents | 265 |  | 265 |  |
Stock-based compensation - ESPP | 31 |  | 31 |  |
Employee stock purchase plan (in shares) |  | 14,982 |  |  |
Employee stock purchase plan | 31 |  |  |  |
Unrealized gain on available-for-sale securities, net of tax | (81) |  |  | (81) |
Foreign currency translation adjustment | (77) |  |  | (77) |
Net income | $ 6,776 |  |  |  | 6,776
Common stock outstanding, ending (in shares) at Dec. 31, 2015 | 9,183,957 | 9,183,957 |  |  |
Balance at end of the period at Dec. 31, 2015 | $ 82,569 | $ 9 | $ 46,291 | $ (166) | $ 36,435

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