Note 9 - Other Real Estate Owned - Other Real Estate Owned (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Other Real Estate Owned	$ 5,087	$ 5,489	$ 8,000	$ 10,673
Construction and Land Development OREO [Member]
Other Real Estate Owned	4,089	4,433
Residential Real Estate OREO [Member]
Other Real Estate Owned	35	157
Farmland and Other Commercial Enterprises OREO [Member]
Other Real Estate Owned	963	899
OREO [Member]
Other Real Estate Owned	$ 5,087	$ 5,489