Note 5 - Loans and Allowance for Loan Losses - Non-accruing Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Non-accruing loans	$ 1,864	$ 2,759
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Non-accruing loans	73	73
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Non-accruing loans	693	1,097
Real Estate [Member] | Secured by Multi-family Residential Properties [Member]
Non-accruing loans		0
Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member]
Non-accruing loans	11	14
Commercial and Industrial Loans [Member]
Non-accruing loans	37	424
Consumer Portfolio Segment [Member] | Consumer Loans [Member]
Non-accruing loans	733	879
Consumer Portfolio Segment [Member] | Branch Retail [Member]
Non-accruing loans	127	153
Consumer Portfolio Segment [Member] | Indirect Sales [Member]
Non-accruing loans	$ 190	$ 119