Segment Reporting (Details 1) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Summary of long-lived assets by geography
Total long-lived assets	$ 275,855	$ 252,630	$ 251,342
United States
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	220,023	200,025	198,744
Other Americas [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	728	475	611
Americas [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	220,751	200,500	199,355
China [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	15,729	9,608	3,005
Other Asia [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	27,890	30,021	34,673
Asia [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	43,619	39,629	37,678
Europe, Middle East and Africa [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	10,474	11,784	13,615
Japan [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	$ 1,011	$ 717	$ 694