Consolidated Statements of Stockholders' Equity (Unaudited) (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, 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	10,156,422
Shares issued – stock options exercised	5	5,435				5,440
Shares issued – stock options exercised, shares (in Shares)	2,000
Stock-based compensation		10,000				10,000
Cash dividend				(2,536,131)		(2,536,131)
Net income				3,394,514		3,394,514
Translation adjustment					74,266	74,266
Balance at Sep. 30, 2012	26,765	5,751,978	(2,894,068)	32,040,319	456,896	35,381,890
Balance, shares (in Shares) at Sep. 30, 2012	10,158,422
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				4,777,506		4,777,506
Translation adjustment					(88,694)	(88,694)
Balance at Sep. 30, 2013	$ 26,862	$ 5,892,907	$ (2,894,068)	$ 39,019,381	$ 290,233	$ 42,335,315
Balance, shares (in Shares) at Sep. 30, 2013	10,198,733					11,192,356