Segment Reporting (Details 1) - USD ($) $ in Thousands	Jun. 27, 2020	Dec. 28, 2019
Summary of long-lived assets by geography
Total long-lived assets	$ 282,738	$ 275,855
United States [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	230,688	220,023
Other Americas [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	686	728
Americas [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	231,374	220,751
China [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	14,274	15,729
Other Asia [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	26,030	27,890
Asia [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	40,304	43,619
EMEA [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	10,224	10,474
Japan [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	$ 836	$ 1,011