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Segment, Geographic, Product and Significant Customer Information | 9 Months Ended
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Sep. 26, 2015
Segment Reporting [Abstract] |
Segment, Geographic, Product and Significant Customer Information | Segment, Geographic, Product and Significant Customer Information The Company has one operating segment, which is the sale, design, manufacture, marketing and support of optical critical dimension and thin film systems. The following tables summarize total net revenues and long-lived assets (excluding intangible assets) attributed to significant countries (in thousands):
| Three Months Ended |  | Nine Months Ended
| September 26, 2015 |  | September 27, 2014 |  | September 26, 2015 |  | September 27, 2014
Total net revenues: |  |  |  |  |  |  |
United States | $ | 7,985 |  |  | 5,511 |  |  | $ | 32,115 |  |  | 25,554 |
South Korea | 6,794 |  |  | 6,327 |  |  | 28,807 |  |  | 30,589 |
Taiwan | 11,331 |  |  | 640 |  |  | 35,173 |  |  | 11,337 |
China | 6,731 |  |  | 2,848 |  |  | 12,357 |  |  | 27,694 |
Japan | 7,778 |  |  | 4,099 |  |  | 15,919 |  |  | 10,005 |
Other | 5,059 |  |  | 7,708 |  |  | 20,311 |  |  | 21,559 |
Total net revenues | $ | 45,678 |  |  | $ | 27,133 |  |  | $ | 144,682 |  |  | $ | 126,738 |
Long-lived tangible assets: | September 26, 2015 |  | December 27, 2014
United States | $ | 44,410 |  |  | $ | 47,729 |
Taiwan | 1,146 |  |  | 1,473 |
All Other | 388 |  |  | 431 |
Total long-lived tangible assets | $ | 45,944 |  |  | $ | 49,633 |
The following customers accounted for 10% or more of total accounts receivable, net:
| At
| September 26, 2015 |  | December 27, 2014
Micron | *** |  |  | 24 | %
Taiwan Semiconductor Manufacturing Company Limited | 28 | % |  | 20 | %
SK Hynix | 15 | % |  | *** |
Samsung Electronics Co. Ltd. | *** |  |  | 10 | %
Global Foundries | *** |  |  | 10 | %
Toshiba | 13 | % |  | *** |
*** The customer accounted for less than 10% of total accounts receivable, net, as of that period end. The following customers accounted for 10% or more of total net revenues:
| Three Months Ended |  | Nine Months Ended
| September 26, 2015 |  | September 27, 2014 |  | September 26, 2015 |  | September 27, 2014
Micron | 14 | % |  | 25 | % |  | 18 | % |  | *** |
Taiwan Semiconductor Manufacturing Company Limited | 17 | % |  | *** |  |  | 19 | % |  | *** |
SK Hynix | 15 | % |  | 27 | % |  | 13 | % |  | 16 | %
Samsung Electronics Co. Ltd. | *** |  |  | *** |  |  | 16 | % |  | 28 | %
Toshiba | 13 | % |  | *** |  |  | *** |  |  | *** |
Intel Corporation | *** |  |  | *** |  |  | *** |  |  | 14 | %
*** The customer accounted for less than 10% of total net revenues during the period.

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