Note 5 - Securities (Details) - The Amortized Cost and Estimated Fair Value of Available-for-sale and Held-to-maturity Securities - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Amounts maturing in:
One year or less	$ 7,237
One year or less	7,258
One year through five years	51,370
One year through five years	51,602
One year through five years	1,504
One year through five years	1,540
Five years through ten years	50,613
Five years through ten years	51,544
Five years through ten years	16,619
Five years through ten years	16,874
After ten years	46,463
After ten years	46,905
After ten years	17,970
After ten years	17,880
Total	155,683
Total	157,309	$ 186,986
Total	36,093
Total	$ 36,294