Note 4 - Loans - Non Accrual Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Non-accrual loans	$ 920	$ 1,311
Commercial Real Estate Portfolio Segment [Member] | Land Loans [Member]
Non-accrual loans	906	993
Commercial Portfolio Segment [Member]
Non-accrual loans	0	302
Residential Portfolio Segment [Member]
Non-accrual loans	$ 14	$ 16