Note 5 - Leases (Details Textual)	Dec. 31, 2021
Minimum [Member] | Real Estate Lease[Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	1 year
Minimum [Member] | Lease Extensions [Member]
Lessee, Operating Lease, Term of Contract (Year)	1 year
Maximum [Member] | Real Estate Lease[Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	10 years
Maximum [Member] | Lease Extensions [Member]
Lessee, Operating Lease, Term of Contract (Year)	5 years