Note 9 - Restructuring (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Jan. 02, 2021	Dec. 28, 2019	Jun. 30, 2017
Restructuring and Related Costs, Incurred Cost, Total			$ 200
Restructuring Charges, Total	$ 940	$ 3,937		$ 4,664
Q1 2020 Plan [Member]
Restructuring and Related Costs, Incurred Cost, Total		2,000
Restructuring and Related Cost, Cost Incurred to Date	2,200
Q2 2019 Sales Plan [Member]
Restructuring and Related Cost, Cost Incurred to Date	2,100
Restructuring Charges, Total			$ 0
Q2 2019 Sales Plan [Member] | Hyderabad [Member]
Noncontrolling Interest, Ownership Percentage by Parent					100.00%
Q2 2019 Sales Plan [Member] | Minimum [Member]
Restructuring Charges, Total		100
Q2 2019 Sales Plan [Member] | Maximum [Member]
Restructuring Charges, Total				2,000
June 2017 Plan [Member]
Restructuring and Related Costs, Incurred Cost, Total	21,600
June 2017 Plan [Member] | Facility Closing [Member]
Restructuring and Related Costs, Incurred Cost, Total				$ 2,700
Restructuring Charges, Total	700	$ 1,900
June 2017 Plan [Member] | Minimum [Member]
Restructuring and Related Cost, Expected Cost, Total	22,000
June 2017 Plan [Member] | Maximum [Member]
Restructuring and Related Cost, Expected Cost, Total	$ 23,500