Segment Reporting and Geographic Information - Schedule of Revenue from External Customers by Products and Services (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2021	Sep. 26, 2020	Sep. 25, 2021	Sep. 26, 2020
Segment Reporting Information [Line Items]
Total revenue	$ 200,589	$ 126,492	$ 563,255	$ 401,368
Sales [Member] | Product [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Systems and Software [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 170,937	$ 97,774	$ 475,345	$ 321,062
Systems and Software [Member] | Sales [Member] | Product [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	85.00%	77.00%	84.00%	80.00%
Parts Revenue [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 17,804	$ 18,815	$ 53,919	$ 48,719
Parts Revenue [Member] | Sales [Member] | Product [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	9.00%	15.00%	10.00%	12.00%
Service Revenue [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 11,848	$ 9,903	$ 33,991	$ 31,587
Service Revenue [Member] | Sales [Member] | Product [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	6.00%	8.00%	6.00%	8.00%