Segment Reporting (Details 1) - USD ($) $ in Thousands	Mar. 28, 2020	Dec. 28, 2019
Summary of long-lived assets by geography
Total long-lived assets	$ 281,207	$ 275,855
United States [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	227,969	220,023
Other Americas [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	596	728
Americas [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	228,565	220,751
China [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	14,778	15,729
Other Asia [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	27,155	27,890
Asia [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	41,933	43,619
EMEA [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	9,719	10,474
Japan [Member]
Summary of long-lived assets by geography
Long-lived assets in individual foreign countries	$ 990	$ 1,011