Note 8 - Leases (Details Textual) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 2.9	$ 3.1
Operating Lease, Weighted Average Remaining Lease Term (Year)	3 years 7 months 6 days		3 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	5.50%		5.60%
Operating Lease, Liability, Current	$ 5.5
Letters of Credit Outstanding, Amount	$ 0.8