Note 2 - Investment Securities (Details) - Available-for-sale Securities by Contractual Maturity - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Available-for-sale Securities by Contractual Maturity [Abstract]
One year or less	$ 0
One year or less	0
Over one through five years	1,931
Over one through five years	1,961
Over five through ten years	9,268
Over five through ten years	9,332
Greater than 10 years	38,829
Greater than 10 years	39,393
	50,028	$ 53,913
	$ 50,686	$ 54,603