Note 4 - Securities (Details) - The Amortized Cost and Estimated Fair Value of Available-for-Sale and Held-to-Maturity Securities - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Amounts maturing in:
One year or less	$ 6,429
One year or less	6,439
One year through five years	49,413
One year through five years	49,535
One year through five years	1,518
One year through five years	1,554
Five years through ten years	54,263
Five years through ten years	55,326
Five years through ten years	16,415
Five years through ten years	16,887
After ten years	47,327
After ten years	47,730
After ten years	17,966
After ten years	18,204
Total	157,432
Total	159,030	$ 186,986
Total	35,899
Total	$ 36,645