Note 21 - Qualified Affordable Housing Project Investments (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Amortization Method Qualified Affordable Housing Project Investments	$ 6,700,000		$ 6,700,000		$ 7,600,000
Qualified Affordable Housing Project Investments, Commitment	2,500,000		2,500,000		$ 2,600,000
Amortization Method Qualified Affordable Housing Project Investments, Amortization	$ 282,000	$ 268,000	$ 846,000	$ 778,000
Minimum [Member]
Affordable Housing Tax Credits Commitment, Year to be Paid			2023
Maximum [Member]
Affordable Housing Tax Credits Commitment, Year to be Paid			2038