Note 5 - Other Real Estate Owned (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Real Estate	$ 9,618	$ 8,839	$ 10,402
Other Real Estate, Foreclosed Assets, and Repossessed Assets	1,340
Mortgage Loans in Process of Foreclosure, Amount	$ 173