Note 5 - Loans and the Allowance for Credit Losses - Amortized Cost of of the Modified Loans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Commercial Portfolio Segment [Member]
Modified	$ 11,150	$ 0	$ 11,276	$ 53
Modified, percentage	0.75%	0.00%	0.75%	0.00%
Commercial Portfolio Segment [Member] | Extended Maturity [Member]
Modified	$ 11,150	$ 0	$ 11,150	$ 53
Commercial Portfolio Segment [Member] | Payment Deferral [Member]
Modified	0	0	126	0
Commercial Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Modified	0	0	0	0
Commercial Real Estate Portfolio Segment [Member]
Modified		$ 213		$ 213
Modified, percentage		0.00%		0.00%
Commercial Real Estate Portfolio Segment [Member] | Extended Maturity [Member]
Modified		$ 213		$ 213
Commercial Real Estate Portfolio Segment [Member] | Payment Deferral [Member]
Modified
Commercial Real Estate Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Modified
Residential Portfolio Segment [Member]
Modified	$ 1,417		$ 1,417
Modified, percentage	0.01%		0.01%
Residential Portfolio Segment [Member] | Extended Maturity [Member]
Modified	$ 1,417		$ 1,417
Residential Portfolio Segment [Member] | Payment Deferral [Member]
Modified	0		0
Residential Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Modified	$ 0		$ 0