Note 3 - Securities (Details) - Securities by Contractual Maturity - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Securities by Contractual Maturity [Abstract]
Due in one year or less	$ 1,002
Due in one year or less	1,005
Due in one year or less	410
Due in one year or less	422
Due in over one to five years	6,417
Due in over one to five years	6,754
Due in over one to five years	8,013
Due in over one to five years	7,981
Due in over five to ten years	11,724
Due in over five to ten years	12,108
Due after ten years	3,355
Due after ten years	3,246
Agency mortgage-backed securities, residential	75,144
Agency mortgage-backed securities, residential	75,977
Agency mortgage-backed securities, residential	8
Agency mortgage-backed securities, residential	8
Total debt securities	84,159
Total debt securities	84,963
Total debt securities	21,914	$ 22,820
Total debt securities	$ 22,538	$ 23,570