Note 8 - Loans - Performance of Modified Loans (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Modified	$ 2,751
Financial Asset, Not Past Due [Member]
Modified	0
Financial Asset, 30 to 89 Days Past Due [Member]
Modified	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modified	2,751
Commercial Portfolio Segment [Member]
Modified	2,529
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Modified	0
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	2,529
Residential Mortgage and Equity Lines Portfolio Segment [Member]
Modified	222
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Modified	0
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modified	222
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Modified	$ 0