Note 14 - Fair Value - Assets Measured at Fair Value on Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member] - Non-covered Loans [Member] - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Collateral Dependent Assets With Specific Reserves [Member]
Total Fair Value	$ 574	$ 574
Collateral Dependent Assets With Specific Reserves [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	0	0
Collateral Dependent Assets With Specific Reserves [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	0	0
Collateral Dependent Assets With Specific Reserves [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	574	574
OREO [Member]
Total Fair Value	481	703
OREO [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	0	0
OREO [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	0	0
OREO [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	$ 481	$ 703