Note 6 - Premises and Equipment (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Depreciation	$ 1,200,000	$ 1,363,000	$ 1,211,000
Operating liability	3,752,000
Right-of-use assets	$ 945,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Premises and equipment, net
Other Liabilities [Member]
Property, Plant and Equipment [Line Items]
Operating liability	$ 952,000