Note 22 - Qualified Affordable Housing Project Investment (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Amortization Method Qualified Affordable Housing Project Investments, Amortization	$ 355,000	$ 338,000	$ 361,000
Affordable Housing Tax Credits and Other Tax Benefits, Amount	423,000	468,000	$ 497,000
Other Assets [Member]
Investments, Total	2,500,000	2,900,000
Other Liabilities [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	$ 216,000	$ 496,000