STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2009	$ 78,494	$ 28,333,094	$ (25,017,634)	$ 3,393,954
Balance (in shares) at Dec. 31, 2009	7,849,462
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	1,013,310	1,013,310
Cash dividend paid	0	0	(394,980)	(394,980)
Exercise of stock options	500	49,500	0	50,000
Exercise of stock options (in shares)	50,000
Stock-based compensation	0	57,992	0	57,992
Balance at Dec. 31, 2010	78,994	28,440,586	(24,399,304)	4,120,276
Balance (in shares) at Dec. 31, 2010	7,899,462			7,899,462
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	908,589	908,589
Cash dividend paid	0	0	(395,731)	(395,731)
Exercise of stock options	210	20,790	0	21,000
Exercise of stock options (in shares)	21,000
Stock-based compensation	0	136,303	0	136,303
Balance at Dec. 31, 2011	$ 79,204	$ 28,597,679	$ (23,886,446)	$ 4,790,437
Balance (in shares) at Dec. 31, 2011	7,920,462			7,920,462