Note 10 - Leases (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Sublease Income	$ 33.0	$ 26.9
Lessee, Leases, Residual Value Guarantee, Amount	$ 59.6
Lessee, Operating Lease, Option To Terminate Term (Year)	1 year
Sales-type Lease, Lease Receivable	$ 5.4
Minimum [Member]
Lessee, Leases, Term of Contract (Month)	1 month
Lessee, Operating Lease, Term of Contract (Year)	1 year
Lessor, Leases, Term of Contract (Year)	1 year
Maximum [Member]
Lessee, Leases, Term of Contract (Month)	10 years
Lessee, Operating Lease, Term of Contract (Year)	83 years
Lessor, Leases, Term of Contract (Year)	10 years