Note 4 - Loans - Covered Loans by Class (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Covered loans	$ 9,680	$ 12,861
Commercial Portfolio Segment [Member]
Covered loans	210	230
Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]
Covered loans	25	28
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]
Covered loans	185	199
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]
Covered loans	0	3
Consumer Real Estate Portfolio Segment [Member]
Covered loans	9,470	12,631
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]
Covered loans	7,094	9,853
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]
Covered loans	$ 2,376	$ 2,778