Note 5 - Loans and the Allowance for Credit Losses - Aging of Modified Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Modified	$ 83,317	$ 17,798
Financial Asset, Not Past Due [Member]
Modified	83,317	17,798
Financial Asset, 30 to 89 Days Past Due [Member]
Modified	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modified	0	0
Commercial Portfolio Segment [Member]
Modified	18,100	10,317
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Modified	18,100	10,317
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 89 Days Past Due [Member]
Modified	0	0
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modified	0	0
Commercial Real Estate Portfolio Segment [Member]
Modified	63,804	7,481
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Modified	63,804	7,481
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 89 Days Past Due [Member]
Modified	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modified	0	$ 0
Residential Portfolio Segment [Member]
Modified	1,413
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Modified	1,413
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