Note 9 - Leases (Details Textual) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 3.7	$ 6.8
Operating Lease, Weighted Average Remaining Lease Term (Year)	3 years 7 months 6 days		4 years 4 months 24 days
Operating Lease, Weighted Average Discount Rate, Percent	5.40%		5.10%
Operating Lease, Liability, Current	$ 5.3