Note 9 - Derivatives and Hedging Activities - Fair Value of Derivative Instruments (Details) - Interest Rate Swap [Member] - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Notional Amount	$ 470,678,000	$ 401,572,000
Other Assets [Member]
Derivative Assets Interest rate swaps	22,871,000	25,697,000
Other Liabilities [Member]
Derivative Liabilities Interest rate swaps	$ 23,254,000	$ 25,900,000