Note 10 - Leases (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Operating Lease, Weighted Average Remaining Lease Term (Year)	10 years 11 months 12 days	12 years 3 months 29 days
Operating Lease, Weighted Average Discount Rate, Percent	3.23%	3.51%
Operating Lease, Cost	$ 67,000	$ 48,000
Other Assets [Member]
Operating Lease, Right-of-Use Asset	1,500,000
Other Liabilities [Member]
Operating Lease, Liability, Total	$ 1,602,000		$ 1,700,000