Note 8 - Leases (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Operating Lease, Weighted Average Remaining Lease Term (Year)	4 years 7 months 6 days
Operating Lease, Weighted Average Discount Rate, Percent	6.50%
Operating Lease, Cost	$ 7.6	$ 7.7	$ 8.3
Operating Lease Liability for Previously Restructured Facilities	$ 8.2
Minimum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	1 year
Maximum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	8 years
Lessee, Operating Lease, Option to Extend, Period (Year)	5 years
Lessee, Operating Lease, Option to Terminate Period (Year)	1 year