Note 4 - Earnings Per Share (Details) - Computation of Basic and Diluted Earnings Per Share (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Numerator:
Net income (in Dollars)	$ 1,628,562	$ 1,561,832	$ 5,248,459	$ 4,777,506
Numerator for basic and diluted earnings per share (in Dollars)	$ 1,628,562	$ 1,561,832	$ 5,248,459	$ 4,777,506
Denominator:
Weighted-average shares outstanding-basic	10,203,711	10,176,744	10,200,411	10,163,490
Effect of dilutive securities:
Stock options	84,600	111,600
Restricted stock	1,405		1,565
Dilutive potential common shares	37,699	44,768	39,698	41,858
Denominator for diluted earnings per share-weighted-average shares	10,241,410	10,221,512	10,240,109	10,205,348
Basic earnings per share (in Dollars per share)	$ 0.16	$ 0.15	$ 0.51	$ 0.47
Diluted earnings per share (in Dollars per share)	$ 0.16	$ 0.15	$ 0.51	$ 0.47
Employee Stock Option [Member]
Effect of dilutive securities:
Stock options	36,294	44,768	38,133	41,858