Segment Reporting and Geographic Information - (Tables)

12 Months Ended

Dec. 26, 2020

Segment Reporting [Abstract]

Schedule of Revenue from External Customers by Products and Services

The following table lists the different sources of revenue:

	Year Ended December 26,				Year Ended December 31,
	2020				2019				2018
Systems and software	$	450,459	80	%	$	255,723	84	%	$	234,241	86	%
Parts		65,444	12	%		34,892	11	%		28,658	10	%
Services		40,593	8	%		15,281	5	%		10,885	4	%
Total revenue	$	556,496	100	%	$	305,896	100	%	$	273,784	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:

	Year Ended December 26,		Year Ended December 31,
	2020		2019		2018
Revenue from third parties:
China	$	125,023	$	80,017	$	63,243
Taiwan		120,959		66,601		45,312
South Korea		90,193		43,997		51,750
United States		81,708		46,717		43,944
Japan		59,295		29,816		22,361
Europe		49,697		23,023		27,173
Southeast Asia		29,621		15,725		20,001
Total revenue	$	556,496	$	305,896	$	273,784

Schedule of Revenue by Major Customer by Reporting Segments

The following chart identifies our customers that represented 10% or more of total revenue for each of the last three fiscal years:

	2020			2019			2018
Samsung Semiconductor		15	%	^			^
Taiwan Semiconductor Manufacturing Co. Ltd.		14	%		13	%	^
SK Hynix Inc.	^				13	%		12	%

^ The customer accounted for less than 10% of total revenue during the period.