Note 9 - Loans - Performance of Modified Loans (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Modified	$ 2,653	$ 2,688
Financial Asset, Not Past Due [Member]
Modified	2,653	2,688
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	2,653	2,688
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Modified	2,653	2,688
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