Note 5 - Loans and Allowance for Loan Losses - Non-accruing Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Non-accruing loans	$ 2,759	$ 2,148
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Non-accruing loans	73
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Non-accruing loans	1,097	501
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	14	29
Commercial and Industrial Loans [Member]
Non-accruing loans	424	12
Consumer Portfolio Segment [Member] | Consumer Loans [Member]
Non-accruing loans	879	1,173
Consumer Portfolio Segment [Member] | Branch Retail [Member]
Non-accruing loans	153	285
Consumer Portfolio Segment [Member] | Indirect Sales [Member]
Non-accruing loans	$ 119	$ 148