Note 11 - Leases (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Property, Plant, and Equipment, Net [Member]
Operating Lease, Right-of-Use Asset		$ 58.9
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	$ 6.4	$ 5.3
Leased Office Facility [Member]
Impairment of Long-Lived Assets to be Disposed of	7.5
Operating Lease, Right-of-Use Asset	$ 41.2