Note 5 - Loans and the Allowance for Credit Losses - Aging of 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
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Modified			21,559
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 89 Days Past Due [Member]
Modified			0
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modified			0
Commercial Real Estate Portfolio Segment [Member]
Modified		$ 213		$ 213
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Modified			7,272
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 89 Days Past Due [Member]
Modified			0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modified			0
Residential Portfolio Segment [Member]
Modified	$ 1,417		1,417
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Modified			1,417
Residential Portfolio Segment [Member] | Financial Asset, 30 to 89 Days Past Due [Member]
Modified			0
Residential Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modified			$ 0