Schedule of Geographic Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2021	Jul. 03, 2020	Jul. 02, 2021	Jul. 03, 2020
Segment Reporting Information [Line Items]
Revenue	$ 167,523	$ 144,728	$ 330,107	$ 300,196
United States
Segment Reporting Information [Line Items]
Revenue	59,497	54,524	118,727	113,729
Germany
Segment Reporting Information [Line Items]
Revenue	23,773	22,148	46,135	45,381
Rest of Europe
Segment Reporting Information [Line Items]
Revenue	35,600	30,713	71,175	63,798
China
Segment Reporting Information [Line Items]
Revenue	23,506	17,472	46,057	32,876
Rest of Asia-Pacific
Segment Reporting Information [Line Items]
Revenue	22,762	17,842	43,509	39,542
Other Countries
Segment Reporting Information [Line Items]
Revenue	$ 2,385	$ 2,029	$ 4,504	$ 4,870