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Geographic and Significant Customer Information | 3 Months Ended
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Mar. 29, 2014
Geographic and Significant Customer Information [Abstract] |
Geographic and Significant Customer Information | 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 following tables summarize total net revenues (based on the deployments and service location of the systems) and long-lived assets (excluding intangible assets) attributed to significant geographic regions (in thousands):
| Three Months Ended
| March 29, 2014 |  | March 30, 2013
Total net revenues: |  |  |
United States | $ | 6,741 |  |  | $ | 9,433 |
Japan | 3,684 |  |  | 5,212 |
Taiwan | 4,416 |  |  | 2,310 |
China | 15,488 |  |  | 644 |
South Korea | 15,889 |  |  | 3,547 |
Other | 5,358 |  |  | 3,406 |
Total net revenues | $ | 51,576 |  |  | $ | 24,552 |
| At
| March 29, 2014 |  | December 28, 2013
Long-lived tangible assets: |  |  |
United States | $ | 44,545 |  |  | $ | 44,775 |
Japan | 122 |  |  | 125 |
South Korea | 401 |  |  | 445 |
All Other | 2,063 |  |  | 2,094 |
Total long-lived tangible assets | $ | 47,131 |  |  | $ | 47,439 |
The following customers accounted for 10% or more of total accounts receivable:
| At
| March 29, 2014 |  | December 28, 2013
Intel Corporation | 19.0 | % |  | 14.4 | %
SK Hynix | 10.9 | % |  | 21.8 | %
Samsung Electronics Co. Ltd. | 21.9 | % |  | 27.4 | %
Taiwan Semiconductor Mfg. Co. | 18.1 | % |  | 12.1 | %
The following customers accounted for 10% or more of total net revenues:
| Three Months Ended
| March 29, 2014 |  | March 30, 2013
Intel Corporation | 13.1 | % |  | 29.3 | %
Samsung Electronics Co. Ltd. | 51.7 | % |  | *** |
*** The customer accounted for less than 10% of total net revenues for that period.

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- Definition Geographic and significant customer information. + References No definition available. + Details
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