Note 6 - Restructuring (Details Textual) - USD ($) $ in Thousands	3 Months Ended					9 Months Ended
	Oct. 02, 2022	Oct. 01, 2022	Jul. 02, 2022	Oct. 02, 2021	Jul. 03, 2021	Oct. 02, 2022	Oct. 01, 2022	Oct. 02, 2021
Restructuring Charges, Total			$ 2,315		$ 166		$ 2,505	$ 546
Operating Lease, Impairment Loss							1,149	0
Q2 2019 Sales Plan [Member]
Restructuring and Related Cost, Incurred Cost		$ 1,000					1,000
Restructuring Charges, Total	$ 0					$ 0
Restructuring and Related Cost, Cost Incurred to Date		3,100					3,100
June 2017 Plan [Member]
Restructuring and Related Cost, Incurred Cost		1,300		$ 100			$ 1,600	500
Restructuring and Related Cost, Cost Incurred to Date				$ 23,200				$ 23,200
June 2017 Plan [Member] | San Jose [Member]
Operating Lease, Impairment Loss		$ 1,100