Note 6 - Leases (Details Textual) $ in Millions	Dec. 31, 2022 USD ($)
Lessee, Operating Lease, Lease Not yet Commenced	$ 168
Minimum [Member]
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract (Year)	10 years
Maximum [Member]
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract (Year)	20 years