Note 3 - Loans - Covered Loans by Class (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Covered loans	$ 15,520	$ 18,815
Commercial Portfolio Segment [Member]
Covered loans	260	279
Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]
Covered loans	31	35
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]
Covered loans	224	238
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]
Covered loans	5	6
Consumer Real Estate Portfolio Segment [Member]
Covered loans	15,260	18,536
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]
Covered loans	12,254	15,284
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]
Covered loans	$ 3,006	$ 3,252