Note 8 - Leases (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Operating Lease, Expense	$ 0.8	$ 2.1	$ 0.6	$ 1.9
Operating Lease, Weighted Average Remaining Lease Term (Year)	15 years		15 years
Operating Lease, Weighted Average Discount Rate, Percent	3.60%		3.60%