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Segment Reporting and Geographic Information | 12 Months Ended
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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.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-15 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 31 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-31 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-42 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-40 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//280/tableOfContent Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 26 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-26 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 34 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-34 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-41 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-21 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-21 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 + Details
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