Note 10 - Leases (Details Textual) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Operating Lease, Right-of-Use Asset	$ 376,000
Buildings and Equipment [Member]
Operating Lease, Right-of-Use Asset		$ 424,000
Minimum [Member]
Lessee, Operating Lease, Remaining Lease Term (Month)	17 months
Maximum [Member]
Lessee, Operating Lease, Remaining Lease Term (Month)	28 months