Segment Reporting and Geographic Information - (Tables)

6 Months Ended

Jun. 27, 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								Six Months Ended
	June 27,				June 30,				June 27,				June 30,
	2020				2019				2020				2019
Systems and software	$	108,247	80	%	$	51,612	84	%	$	222,577	81	%	$	101,421	83	%
Parts		16,329	12	%		7,073	11	%		29,904	11	%		15,150	12	%
Services		10,372	8	%		2,826	5	%		22,395	8	%		5,832	5	%
Total revenue	$	134,948	100	%	$	61,511	100	%	$	274,876	100	%	$	122,403	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				Six Months Ended
	June 27,		June 30,		June 27,		June 30,
	2020		2019		2020		2019
Revenue from third parties:
United States	$	22,378	$	8,932	$	42,026	$	18,063
Taiwan		31,997		7,111		67,178		18,142
Japan		13,908		3,427		28,935		7,367
China		27,001		24,177		58,384		40,221
South Korea		22,964		10,775		43,721		21,546
Singapore		6,338		1,596		8,928		3,612
Other Asia		273		1,047		546		2,039
Germany		2,510		674		8,592		2,524
Other Europe		7,579		3,772		16,566		8,889
Total revenue	$	134,948	$	61,511	$	274,876	$	122,403

Schedule of Revenue by Major Customer by Reporting Segments

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

	Six Months Ended
	June 27,			June 30,
	2020			2019
Customer A		18.2	%		3.7	%
Customer B		17.3	%		6.9	%
Customer C		7.1	%		24.6	%