Segment Reporting and Geographic Information - (Tables)

9 Months Ended

Sep. 26, 2020

Segment Reporting [Abstract]

Schedule of Revenue from External Customers by Products and Services

The following table lists the different sources of revenue:

	Three Months Ended								Nine Months Ended
	September 26,				September 30,				September 26,				September 30,
	2020				2019				2020				2019
Systems and software	$	97,774	77	%	$	52,786	84	%	$	321,062	80	%	$	154,207	83	%
Parts		18,815	15	%		7,142	11	%		48,719	12	%		22,292	12	%
Services		9,903	8	%		3,007	5	%		31,587	8	%		8,839	5	%
Total revenue	$	126,492	100	%	$	62,935	100	%	$	401,368	100	%	$	185,338	100	%

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area

For geographical revenue reporting, revenue is attributed to the geographic location to which the product is shipped.  Revenue by geographic region is as follows:

	Three Months Ended				Nine Months Ended
	September 26,		September 30,		September 26,		September 30,
	2020		2019		2020		2019
Revenue from third parties:
United States	$	16,036	$	8,816	$	58,062	$	26,879
Taiwan		30,028		14,304		97,206		32,446
Japan		13,698		8,962		42,632		16,330
China		31,911		14,666		90,295		54,887
South Korea		13,250		8,481		56,971		30,027
Singapore		5,690		2,396		14,619		6,007
Other Asia		3,706		1,386		4,252		3,425
Germany		3,760		735		12,352		3,260
Other Europe		8,413		3,189		24,979		12,077
Total revenue	$	126,492	$	62,935	$	401,368	$	185,338

Schedule of Revenue by Major Customer by Reporting Segments

The following customers accounted for more than 10% of total revenue for the indicated periods:

	Nine Months Ended
	September 26,			September 30,
	2020			2019
Customer A		16.2	%		7.8	%
Customer B		14.4	%		6.1	%
Customer C		7.4	%		17.6	%