Consolidated Statements of Changes in Shareholders' Equity (USD $)	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Total
Balance at Dec. 31, 2009	$ 10,782,555	$ (10,144,325)	$ 4,208,112	$ (812,970)	$ 20,507,878	$ 24,541,250
Balance (shares) at Dec. 31, 2009	3,157,859
Net income					2,572,964	2,572,964
Translation adjustment				(40,237)		(40,237)
Change in pension plan net prior service credit and actuarial losses, net of tax				(21,950)		(21,950)
Comprehensive income						2,510,777
Stock compensation expense			385,732			385,732
Distribution to shareholders					(682,128)	(682,128)
Issuance of common stock	153,121		9,350			162,471
Issuance of common stock (shares)	61,550
Purchase of treasury stock		(1,566,290)				(1,566,290)
Purchase of treasury stock (shares)	(150,072)
Balance at Dec. 31, 2010	10,935,676	(11,710,616)	4,603,194	(875,157)	22,398,714	25,351,811
Balance (shares) at Dec. 31, 2010	3,069,337
Net income					2,811,193	2,811,193
Translation adjustment				(229,853)		(229,853)
Change in pension plan net prior service credit and actuarial losses, net of tax				66,691		66,691
Comprehensive income						2,648,031
Stock compensation expense			428,439			428,439
Tax benefit from exercise of employee stock options			24,034			24,034
Distribution to shareholders					(806,887)	(806,887)
Issuance of common stock	198,627		64,610			263,237
Issuance of common stock (shares)	79,450
Purchase of treasury stock		(133,738)				(133,738)
Purchase of treasury stock (shares)	(13,810)
Balance at Dec. 31, 2011	$ 11,134,303	$ (11,844,354)	$ 5,120,277	$ (1,038,319)	$ 24,403,020	$ 27,774,927
Balance (shares) at Dec. 31, 2011	3,134,977