Note 10 - Leases (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Operating Lease, Right-of-Use Asset	$ 23,818	$ 22,178
Operating Lease, Weighted Average Remaining Lease Term (Year)	4 years 1 month 6 days
Operating Lease, Weighted Average Discount Rate, Percent	5.40%
Operating Lease, Cost	$ 7,900	$ 7,600	$ 7,700
Operating Lease Liability for Previously Restructured Facilities	$ 7,100
Minimum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	1 year
Lessee, Operating Lease, Option to Extend, Period (Year)	5 years
Maximum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	7 years
Lessee, Operating Lease, Option to Terminate Period (Year)	1 year
Hillsboro, Oregon and Shanghai, China Facility Leases [Member]
Operating Lease, Right-of-Use Asset	$ 7,200