Note 5 - Other Real Estate Owned (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Real Estate	$ 5,899	$ 6,439	$ 8,839
Other Real Estate, Foreclosed Assets, and Repossessed Assets	496	431
Mortgage Loans in Process of Foreclosure, Amount	$ 307	$ 204