Consolidated Statements Of Changes In stockholders' Equity (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2010	$ 40,537	$ 15,883,899	$ 10,621,379	$ 26,545,815
Balance, shares at Dec. 31, 2010				4,053,660
Exercise of stock options	456	213,214		213,670
Exercise of stock options, shares				45,640
Stock-based compensation		233,541		233,541
Tax benefit from exercise of stock options		61,300		61,300
Shares issued under Employee Stock Purchase Plan	24	21,514		21,538
Shares issued under Employee Stock Purchase Plan, shares				2,401
Net income (loss)			397,667	397,667
Balance at Dec. 31, 2011	41,017	16,413,468	11,019,046	27,473,531
Balance, shares at Dec. 31, 2011				4,101,701
Cash dividend paid			(2,072,227)	(2,072,227)
Exercise of stock options	250	176,813		177,063
Exercise of stock options, shares				24,985
Stock-based compensation		212,459		212,459
Tax benefit from exercise of stock options		32,458		32,458
Common stock repurchases	(39)	(15,429)	(22,967)	(38,435)
Common stock repurchases, shares				(3,867)
Issuance of restricted stock	168	(168)
Issuance of restricted stock, shares				16,820
Shares issued under Employee Stock Purchase Plan	81	83,644		83,725
Shares issued under Employee Stock Purchase Plan, shares				8,104
Net income (loss)			1,016,364	1,016,364
Balance at Dec. 31, 2012	$ 41,477	$ 16,903,245	$ 9,940,216	$ 26,884,938
Balance, shares at Dec. 31, 2012				4,147,743