Note 5 - Operating Leases (Details Textual)	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Lease, Cost, Total	$ 868,000	$ 587,000
Minimum [Member]
Lessee Leasing Arrangements, Operating Leases, Number of Units	1
Lessee, Operating Lease, Renewal Term (Year)	2 years
Maximum [Member]
Lessee, Operating Lease, Term of Contract (Year)	20 years
Lessee, Operating Lease, Renewal Term (Year)	10 years
Building [Member]
Lessee Leasing Arrangements, Operating Leases, Number of Units	8
Building Branch Office [Member]
Lessee Leasing Arrangements, Operating Leases, Number of Units	5
Building Business Centers [Member]
Lessee Leasing Arrangements, Operating Leases, Number of Units	2
Other Assets [Member]
Operating Lease, Right-of-Use Asset	$ 7,600,000
Other Liabilities [Member]
Operating Lease, Liability, Total	$ 7,734,000