Note 15 - Leases (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Aggregate Residual Value at Lease Expiration for Vehicle Leases	$ 12.6
Guarantor Obligations, Maximum Exposure, Undiscounted	9.3
Finance Lease, Right-of-Use Asset, Accumulated Amortization	0.1	$ 0.2
Short-term Lease, Cost	4.0	3.5
Variable Lease, Cost	$ 2.2	$ 1.6