Note 2 - Earnings Per Share and Share Repurchase Plan (Details) - Computation of Basic and Diluted Earnings Per Share (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013	Dec. 31, 2012
Computation of Basic and Diluted Earnings Per Share [Abstract]
Numerator for basic and diluted earnings per share - net income (in Dollars)	$ 1,962		$ 2,128		$ 1,894		$ 2,408		$ 2,125		$ 2,074		$ 2,505		$ 2,471		$ 8,392	$ 9,175
Denominator for basic earnings per share - weighted average shares outstanding																	3,248,397	3,197,204
Effect of dilutive securities - employee stock options																	11,678	12,653
Denominator for diluted earnings per share - adjusted weighted average shares outstanding																	3,260,075	3,209,857
Earnings per share - basic (in Dollars per share)	$ 0.60	[1]	$ 0.65	[1]	$ 0.58	[1]	$ 0.75	[1]	$ 0.66	[1]	$ 0.65	[1]	$ 0.79	[1]	$ 0.78	[1]	$ 2.58	$ 2.87
Earnings per share - diluted (in Dollars per share)	$ 0.60	[1]	$ 0.65	[1]	$ 0.58	[1]	$ 0.74	[1]	$ 0.66	[1]	$ 0.64	[1]	$ 0.78	[1]	$ 0.77	[1]	$ 2.57	$ 2.86

[1] Due to rounding, quarterly earnings per share may not sum to annual earnings per share