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	$ 48,193	$ 10,329,526	$ 5,881,594	$ 16,259,313
Balance (in Shares) at Dec. 31, 2010	4,819,325
Exercise of stock options	1,316	472,657		473,973
Exercise of stock options (in Shares)	131,560			131,560
Stock-based compensation	400	290,198		290,598
Stock-based compensation (in Shares)	39,950
Issuance of common stock under public offering-net	9,680	9,377,986		9,387,666
Issuance of common stock under public offering-net (in Shares)	967,950
Net Income			3,779,123	3,779,123
Balance at Dec. 31, 2011	59,589	20,470,367	9,660,717	30,190,673
Balance (in Shares) at Dec. 31, 2011	5,958,785			5,958,785
Exercise of stock options	682	285,865		286,547
Exercise of stock options (in Shares)	68,210			68,210
Stock-based compensation	199	234,659		234,858
Stock-based compensation (in Shares)	19,975
Net Income			435,586	435,586
Balance at Dec. 31, 2012	$ 60,470	$ 20,990,891	$ 10,096,303	$ 31,147,664
Balance (in Shares) at Dec. 31, 2012	6,046,970			6,046,970