Consolidated Statements of Shareholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Shareholders' equity, beginning of period at Dec. 31, 2009	$ 9,219,354	$ 21,922	$ 13,504,874	$ (4,439,094)	$ 131,652
Common stock, beginning of period (shares) at Dec. 31, 2009		21,921,934
Comprehensive income (loss)
Net earnings	557,746			557,746
Foreign currency translation adjustment	(2,876)				(2,876)
Comprehensive income (loss)	554,870
Exercise of common stock options (shares)		306,900
Exercise of common stock options	44,919	307	44,612
Share-based compensation	56,436		56,436
Shareholders' equity, beginning of period at Dec. 31, 2010	9,875,579	22,229	13,605,922	(3,881,348)	128,776
Common stock, end of period (shares) at Dec. 31, 2010		22,228,834
Comprehensive income (loss)
Net earnings	(71,494)			(71,494)
Foreign currency translation adjustment	14,774				14,774
Comprehensive income (loss)	(56,720)
Exercise of common stock options (shares)		0
Exercise of common stock options	0	0	0
Share-based compensation	44,492		44,492
Shareholders' equity, beginning of period at Dec. 31, 2011	9,863,351	22,229	13,650,414	(3,952,842)	143,550
Common stock, end of period (shares) at Dec. 31, 2011	22,228,834	22,228,834
Comprehensive income (loss)
Net earnings	(361,436)			(361,436)
Foreign currency translation adjustment	(24,733)				(24,733)
Comprehensive income (loss)	(386,169)
Share-based compensation	38,316		38,316
Shareholders' equity, beginning of period at Dec. 31, 2012	$ 9,515,498	$ 22,229	$ 13,688,730	$ (4,314,278)	$ 118,817
Common stock, end of period (shares) at Dec. 31, 2012	22,228,834	22,228,834