Note 22 - Qualified Affordable Housing Project Investment (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Tax Credits and Other Tax Benefits	$ 468,000	$ 497,000
Income Tax Expense (Benefit) [Member]
Investment Amortization	338,000	361,000
Other Assets [Member]
Investments, Total	2,900,000	3,200,000
Other Liabilities [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	$ 496,000	$ 1,900,000