Segment Reporting and Geographic Information

12 Months Ended

Dec. 30, 2023

Segment Reporting [Abstract]

Segment Reporting and Geographic Information

14.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:

	Year Ended
	December 30, 2023				December 31, 2022				January 1, 2022
Systems and software	$	683,316	84	%	$	865,707	86	%	$	669,114	85	%
Parts		74,604	9	%		84,266	8	%		72,753	9	%
Services		57,948	7	%		55,210	6	%		47,032	6	%
Total revenue	$	815,868	100	%	$	1,005,183	100	%	$	788,899	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:

	Year Ended
	December 30, 2023		December 31, 2022		January 1, 2022
Revenue from third parties:
South Korea	$	169,323	$	224,172	$	160,373
Taiwan		141,915		199,104		194,458
China		136,940		250,968		151,027
United States		130,292		121,487		123,858
Japan		93,831		58,133		61,186
Southeast Asia		87,585		71,062		33,054
Europe		55,982		80,256		64,943
Total revenue	$	815,868	$	1,005,183	$	788,899

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

	2023	2022	2021
Samsung Semiconductor	19 %	13 %	16 %
Taiwan Semiconductor Manufacturing Co. Ltd.	14 %	15 %	18 %
SK Hynix Inc.	^	11 %	^
^ The customer accounted for less than 10% of total revenue during the period.

At December 30, 2023 and December 31, 2022, two customers, Taiwan Semiconductor Manufacturing Co. Ltd. and Samsung Semiconductor, accounted for more than 10% of net accounts receivable.

Substantially all of the Company’s long-lived assets are located within the United States of America.