Note 4 - Earnings Per Share (Details) - Computation of basic and diluted earnings per share: (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Numerator:
Net income (in Dollars)	$ 1,561,832	$ 280,770	$ 4,777,506	$ 3,394,514
Numerator for basic and diluted earnings per share (in Dollars)	$ 1,561,832	$ 280,770	$ 4,777,506	$ 3,394,514
Denominator:
Weighted-average shares outstanding-basic	10,176,744	10,156,790	10,163,490	10,156,559
Effect of dilutive securities:
Stock options	44,768	20,676	41,858	23,010
Dilutive potential common shares	44,768	20,676	41,858	23,010
Denominator for diluted earnings per share- weighted-average shares	10,221,512	10,177,466	10,205,348	10,179,569
Basic earnings per share (in Dollars per share)	$ 0.15	$ 0.03	$ 0.47	$ 0.33
Diluted earnings per share (in Dollars per share)	$ 0.15	$ 0.03	$ 0.47	$ 0.33