Segment Reporting and Geographic Information

3 Months Ended

Mar. 27, 2021

Segment Reporting [Abstract]

Segment Reporting and Geographic Information

NOTE 15. Segment Reporting and Geographic Information

The Company is engaged in the design, development, manufacture and support of high-performance control metrology, defect inspection, lithography and data analysis systems used by microelectronics device manufacturers. The Company and its subsidiaries currently operate in a single operating segment: the design, development, manufacture and support of high-performance process control defect inspection and metrology, lithography and process control software systems used by microelectronics device manufacturers. Therefore, the Company has one reportable segment. The Company’s chief operating decision maker is the Chief Executive Officer (the “CEO”). The CEO allocates resources and assesses performance of the business and other activities at the reportable segment level.

The following table lists the different sources of revenue:

	Three Months Ended
	March 27,				March 28,
	2021				2020
Systems and software	$	141,509	84	%	$	114,330	82	%
Parts		17,418	10	%		13,575	10	%
Services		10,352	6	%		12,023	8	%
Total revenue	$	169,279	100	%	$	139,928	100	%

The Company’s significant operations outside the United States include sales, service and application offices in Asia and Europe.  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
	March 27		March 28
	2021		2020
Revenue from third parties:
South Korea	$	50,530	$	20,757
Taiwan		36,293		35,181
China		25,779		31,383
United States		25,480		19,648
Europe		17,385		15,069
Japan		7,865		15,027
Southeast Asia		5,947		2,863
Total revenue	$	169,279	$	139,928

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

	Three Months Ended
	March 27,			March 28,
	2021			2020
Samsung Semiconductor		25	%		18	%
Taiwan Semiconductor Manufacturing Co. Ltd.		13	%		17	%
SK Hynix Inc.		12	%	^
^ The customer accounted for less than 10% of total revenue during the period.