Note 1 - Reconciliation of Basic and Diluted Earnings Per Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net earnings used in the computation of basic and diluted earnings per share	$ 3,624,000	$ 3,907,000	$ 5,667,000	$ 5,125,000
Weighted average shares outstanding - basic (in shares)	13,730,646	13,207,804	13,657,784	13,168,375
Common stock equivalents (in shares)	846,696	440,736	904,929	432,765
Weighted average shares outstanding - diluted (in shares)	14,577,342	13,648,540	14,562,713	13,601,140
Net income (in dollars per share)	$ 0.26	$ 0.30	$ 0.41	$ 0.39
Net earnings (in dollars per share)	$ 0.25	$ 0.29	$ 0.39	$ 0.38