Note 4 - Earnings Per Share (Details) - The following table sets forth the computation of basic and diluted earnings per share: (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Numerator:
Net income (in Dollars)	$ 1,629,353	$ 1,539,638	$ 3,215,674	$ 3,113,744
Numerator for basic and diluted earnings per share (in Dollars)	$ 1,629,353	$ 1,539,638	$ 3,215,674	$ 3,113,744
Denominator:
Weighted-average shares outstanding-basic	10,167,649	10,156,442	10,165,060	10,156,442
Effect of dilutive securities:
Stock options	48,886	15,729	40,379	16,119
Dilutive potential common shares	48,886	15,729	40,379	16,119
Denominator for diluted earnings per share-weighted-average shares	10,216,535	10,172,171	10,205,439	10,172,561
Basic earnings per share (in Dollars per share)	$ 0.16	$ 0.15	$ 0.32	$ 0.30
Diluted earnings per share (in Dollars per share)	$ 0.16	$ 0.15	$ 0.32	$ 0.30