Note 9 - Loans - Performance of Modified Loans (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023
Modified	$ 126	$ 126
Financial Asset, Not Past Due [Member]
Modified	126	126
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	126	126
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Modified	126	126
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