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Consolidated Statements of Stockholders' Equity (USD $) | Common Stock [Member] | Additional Paid-in Capital [Member] | Treasury Stock [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Total
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2010 | $ 26,760 | $ 5,703,387 | $ (2,894,068) | $ 26,429,335 | $ 496,180 | $ 29,761,594
Balance (shares) (in Shares) at Dec. 31, 2010 | 10,156,442 |  |  |  |  |
Stock-based compensation |  | 33,156 |  |  |  | 33,156
Net income |  |  |  | 4,752,601 |  | 4,752,601
Translation adjustment |  |  |  |  | (113,550) | (113,550)
Balance at Dec. 31, 2011 | 26,760 | 5,736,543 | (2,894,068) | 31,181,936 | 382,630 | 34,433,801
Balance (shares) (in Shares) at Dec. 31, 2011 | 10,156,442 |  |  |  |  |
Shares issued - stock options exercised | 15 | 20,965 |  |  |  | 20,980
Shares issued - stock options exercised (shares) (in Shares) | 6,000 |  |  |  |  |
Stock-based compensation |  | 10,000 |  |  |  | 10,000
Net income |  |  |  | 5,596,070 |  | 5,596,070
Cash dividend paid |  |  |  | (2,536,131) |  | (2,536,131)
Translation adjustment |  |  |  |  | (3,703) | (3,703)
Balance at Dec. 31, 2012 | 26,775 | 5,767,508 | (2,894,068) | 34,241,875 | 378,927 | 37,521,017
Balance (shares) (in Shares) at Dec. 31, 2012 | 10,162,442 |  |  |  |  | 11,156,065
Shares issued - stock options exercised | 87 | 113,713 |  |  |  | 113,800
Shares issued - stock options exercised (shares) (in Shares) | 36,291 |  |  |  |  |
Stock-based compensation |  | 11,686 |  |  |  | 11,686
Net income |  |  |  | 7,265,717 |  | 7,265,717
Translation adjustment |  |  |  |  | (290,678) | (290,678)
Balance at Dec. 31, 2013 | $ 26,862 | $ 5,892,907 | $ (2,894,068) | $ 41,507,592 | $ 88,249 | $ 44,621,542
Balance (shares) (in Shares) at Dec. 31, 2013 | 10,198,733 |  |  |  |  | 11,192,356

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