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Segment, Geographic, Product and Significant Customer Information | 12 Months Ended
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Dec. 27, 2014
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 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 27, 2014, December 28, 2013, and December 29, 2012, 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 27, 2014 |  | December 28, 2013 |  | December 29, 2012
Total net revenues (1): |  |  |  |  |
United States | $ | 36,123 |  |  | 47,019 |  |  | 44,811 |
South Korea | 41,381 |  |  | 34,873 |  |  | 79,555 |
China | 28,702 |  |  | 13,063 |  |  | 5,323 |
Taiwan | 19,790 |  |  | 9,645 |  |  | 16,757 |
Other | 40,447 |  |  | 39,707 |  |  | 36,435 |
Total net revenues | $ | 166,443 |  |  | $ | 144,307 |  |  | $ | 182,881 |
(1) Net revenues are attributed to countries based on the customer's deployment and service locations of systems.
Long-lived tangible assets: | December 27, 2014 |  | December 28, 2013
United States | $ | 47,729 |  |  | $ | 44,775 |
Japan | 71 |  |  | 125 |
South Korea | 284 |  |  | 445 |
All Other | 1,549 |  |  | 2,094 |
Total long-lived tangible assets | $ | 49,633 |  |  | $ | 47,439 |
The Company’s product lines differ primarily based on the environment in which the systems will be used. Automated systems are used primarily in high-volume production environments. Materials characterization products are primarily used to measure the composition, band gap, structure, and other physical and electrical properties of semiconducting materials for discrete electronic industry, high brightness LED and solar/photovoltaic structures in both development and high volume environments. Integrated systems are installed inside wafer processing equipment to provide near real-time measurements for improving process control and increasing throughput. Revenues by product type were as follows (in thousands):
| Years Ended
| December 27, 2014 |  | December 28, 2013 |  | December 29, 2012
Automated Systems | $ | 108,768 |  |  | $ | 82,924 |  |  | $ | 119,451 |
Integrated Systems | 15,334 |  |  | 11,412 |  |  | 12,379 |
Materials Characterization Systems | 9,487 |  |  | 13,066 |  |  | 11,997 |
Total product revenues | $ | 133,589 |  |  | $ | 107,402 |  |  | $ | 143,827 |
The following customers accounted for 10% or more of total accounts receivable, net:
| At
| December 27, 2014 |  | December 28, 2013 |  | December 29, 2012
Samsung Electronics Co. Ltd. | 10.0 | % |  | 27.4 | % |  | *** |
Intel Corporation | *** |  |  | 14.4 | % |  | 12.3 | %
Taiwan Semiconductor Manufacturing Company Limited | 20.2 | % |  | 12.1 | % |  | 17.3 | %
SK Hynix | *** |  |  | 21.8 | % |  | *** |
Micron | 23.7 | % |  | *** |  |  | *** |
GLOBALFOUNDRIES | 10.2 | % |  | *** |  |  | *** |
*** 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 revenue:
| Years Ended
| December 27, 2014 |  | December 28, 2013 |  | December 29, 2012
Samsung Electronics Co. Ltd. | 26.9 | % |  | 14.4 | % |  | 27.8 | %
Intel Corporation | 12.6 | % |  | 30.0 | % |  | 22.3 | %
SK Hynix | 12.2 | % |  | 18.4 | % |  | 16.5 | %
Micron | 10.4 | % |  | *** |  |  | *** |
*** The customer accounted for less than 10% of total net revenue during the period.

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