Note 5 - Earnings Per Share (Details) - Computation of Basic and Diluted Earnings Per Share - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Computation of Basic and Diluted Earnings Per Share [Abstract]
Numerator for basic and diluted earnings per share - net income (in Dollars)	$ 2,220	$ 2,044	$ 6,290	$ 6,512
Denominator for basic earnings per share - weighted average shares outstanding	3,343,011	3,298,057	3,332,650	3,286,438
Effect of dilutive securities - employee stock options	13,778	11,408	12,980	9,766
Denominator for diluted earnings per share - adjusted weighted average shares outstanding	3,356,789	3,309,465	3,345,630	3,296,204
Earnings per share - basic (in Dollars per share)	$ 0.66	$ 0.62	$ 1.89	$ 1.98
Earnings per share - diluted (in Dollars per share)	$ 0.66	$ 0.62	$ 1.88	$ 1.98