Note 7 - Leases (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Sep. 30, 2023	Oct. 01, 2022
Operating Lease, Weighted Average Remaining Lease Term (Year)	3 years 4 months 24 days		3 years 4 months 24 days
Operating Lease, Weighted Average Discount Rate, Percent	5.80%		5.80%
Operating Lease, Cost	$ 2.0	$ 1.9	$ 5.8	$ 5.8
Operating Lease Liability for Previously Restructured Facilities	$ 4.9		$ 4.9