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Segment, Geographic, and Significant Customer Information | 12 Months Ended
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Dec. 29, 2018
Segment Reporting [Abstract] |
Segment, Geographic, and Significant Customer Information | Note 15. Segment, Geographic, and Significant Customer Information The Company has one operating segment, which is the sale, design, manufacture, marketing and support of thin film and optical critical dimension systems. The Chief Executive Officer has been identified as the Chief Operating Decision Maker (“CODM”) because he has the final authority over resource allocation decisions and performance assessment. The CODM does not receive discrete financial information about individual components of the Company's business. For the years ended December 29, 2018, December 30, 2017, and December 26, 2016, the Company recorded revenue from customers primarily in the United States, Asia and Europe. The following tables summarize total net revenues and long-lived assets (excluding intangible assets) attributed to significant countries (in thousands):
|  | Years Ended |
|  | December 29, 2018 |  |  | December 30, 2017 |  |  | December 31, 2016 |
Total net revenues (1): |  |  |  |  |  |  |  |  |  |  |  |
South Korea |  | $ | 108,938 |  |  | $ | 94,082 |  |  | $ | 44,735 |
China |  |  | 72,305 |  |  |  | 29,826 |  |  |  | 43,460 |
Japan |  |  | 64,252 |  |  |  | 41,979 |  |  |  | 26,604 |
United States |  |  | 29,415 |  |  |  | 33,983 |  |  |  | 29,887 |
Singapore |  |  | 22,167 |  |  |  | 21,810 |  |  |  | 37,096 |
Taiwan |  |  | 14,012 |  |  |  | 20,147 |  |  |  | 27,189 |
Other |  |  | 13,434 |  |  |  | 16,794 |  |  |  | 12,158 |
Total net revenues |  | $ | 324,523 |  |  | $ | 258,621 |  |  | $ | 221,129 |
(1) | Net revenues are attributed to countries based on the customer's deployment and service locations of systems.
|  | Years Ended |
|  | December 29, 2018 |  |  | December 30, 2017 |
Long-lived tangible assets: |  |  |  |  |  |  |  |
United States |  | $ | 46,325 |  |  | $ | 43,427 |
Taiwan |  |  | 275 |  |  |  | 510 |
South Korea |  |  | 420 |  |  |  | 576 |
Japan |  |  | 59 |  |  |  | 60 |
Singapore |  |  | 618 |  |  |  | 92 |
All Other |  |  | 203 |  |  |  | 145 |
Total long-lived tangible assets |  | $ | 47,900 |  |  | $ | 44,810 |
With respect to customer concentration, Samsung Electronics Co. Ltd., SK hynix, Toshiba Corporation, and Intel Corporation each accounted for more than 10% of total sales for the year ended December 29, 2018, and Samsung Electronics Co. Ltd., SK hynix, Micron Technology, Inc., Intel Corporation, and Toshiba Corporation each accounted for more than 10% of total sales for the year ended December 30, 2017, and Micron Technology, Inc., Intel Corporation, SK hynix, and Taiwan Semiconductor Manufacturing Company Limited each accounted for more than 10% of total sales for the year ended December 31, 2016. With respect to accounts receivable concentration, Toshiba Corporation and SK hynix each accounted for more than 10% of total receivables as of December 29, 2018, and Samsung Electronics Co. Ltd., Micron Technology, Inc., and Intel Corporation each accounted for more than 10% of accounts receivable as of December 30, 2017.

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