Note 15 - Mortgage Banking Activities - Notional Amounts and Fair Values (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Mortgage loans held for sale, at fair value	$ 6,542	$ 2,548
Mortgage loans held for sale, at fair value	6,535	2,606
Derivative assets	17,590	10,727
Other Assets [Member] | Rate Lock Loan Commitments [Member]
Derivative, notional amount	7,632	5,599
Derivative assets	202	137
Other Assets [Member] | Mandatory Forward Contract [Member]
Derivative, notional amount	8,038	6,581
Derivative assets	$ 110	$ 47