Note 9 - Loans - Troubled Debt Restructuring (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)
No. of Contracts		6		14
Pre-modification		$ 4,038		$ 10,877
Post-modification	$ 2,653	4,014	$ 2,688	10,849
Specific Reserve		0		0
Charge-offs		$ 3		$ 2,570
Commercial Portfolio Segment [Member]
No. of Contracts		2		4
Pre-modification		$ 2,572		$ 6,115
Post-modification	$ 2,653	2,572	$ 2,688	6,115
Specific Reserve		0		0
Charge-offs		$ 0		$ 2,566
Residential Mortgage and Equity Lines Portfolio Segment [Member]
No. of Contracts		4		8
Pre-modification		$ 1,466		$ 2,190
Post-modification		1,442		2,162
Specific Reserve		0		0
Charge-offs		$ 3		$ 4
Commercial Mortgage Loans [Member]
No. of Contracts				2
Pre-modification				$ 2,572
Post-modification				2,572
Specific Reserve				0
Charge-offs				$ 0