Note 4 - Earnings Per Share (Details) - Computation of Basic and Diluted Earnings Per Share (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Numerator:
Net income (in Dollars)	$ 1,765,485	$ 1,629,353	$ 3,619,897	$ 3,215,674
Numerator for basic and diluted earnings per share (in Dollars)	$ 1,765,485	$ 1,629,353	$ 3,619,897	$ 3,215,674
Denominator:
Weighted-average shares outstanding-basic	10,198,733	10,167,649	10,198,733	10,165,060
Effect of dilutive securities:
Stock options	119,201	133,600
Restricted stock	1,714		1,647
Dilutive potential common shares	41,090	48,886	40,714	40,379
Denominator for diluted earnings per share-weighted-average shares	10,239,823	10,216,535	10,239,447	10,205,439
Basic earnings per share (in Dollars per share)	$ 0.17	$ 0.16	$ 0.35	$ 0.32
Diluted earnings per share (in Dollars per share)	$ 0.17	$ 0.16	$ 0.35	$ 0.32
Employee Stock Option [Member]
Effect of dilutive securities:
Stock options	39,376	48,886	39,067	40,379