Note 15 - Mortgage Banking Activities - Notional Amounts and Fair Values (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Mortgage loans held for sale, at fair value	$ 6,338	$ 5,965
Mortgage loans held for sale, at fair value	6,462	6,056
Derivative assets	10,823	5,133
Rate Lock Loan Commitments [Member]
Derivative assets	452	174
Mandatory Forward Contract [Member]
Derivative assets	(41)	(43)
Other Assets [Member] | Rate Lock Loan Commitments [Member]
Derivative, notional amount	11,626	4,345
Other Assets [Member] | Mandatory Forward Contract [Member]
Derivative, notional amount	$ 13,250	$ 6,750