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Geographic and Significant Customer Information (Tables) | 6 Months Ended
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Jun. 29, 2013
Geographic and Significant Customer Information [Abstract] |
Total net revenue | The following table summarizes 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 |  | Six Months Ended
| June 29, 2013 |  | June 30, 2012 |  | June 29, 2013 |  | June 30, 2012
Total net revenues: |  |  |  |  |  |  |
United States | $ | 16,328 |  |  | $ | 13,872 |  |  | $ | 25,761 |  |  | $ | 25,449 |
China | 5,407 |  |  | 1,702 |  |  | 6,051 |  |  | 2,637 |
Japan | 2,018 |  |  | 2,511 |  |  | 7,230 |  |  | 6,850 |
South Korea | 5,594 |  |  | 29,638 |  |  | 9,141 |  |  | 57,109 |
Israel | 506 |  |  | 159 |  |  | 761 |  |  | 6,475 |
All Other | 4,699 |  |  | 5,299 |  |  | 10,160 |  |  | 10,153 |
Total net revenues | $ | 34,552 |  |  | $ | 53,181 |  |  | $ | 59,104 |  |  | $ | 108,673 |
Long-lived tangible assets |
| At
| June 29, 2013 |  | December 29, 2012
Long-lived tangible assets: |  |  |
United States | $ | 40,719 |  |  | $ | 40,600 |
Japan | 111 |  |  | 148 |
South Korea | 440 |  |  | 520 |
Israel | 8 |  |  | 13 |
All Other | 2,553 |  |  | 1,932 |
Total long-lived tangible assets | $ | 43,831 |  |  | $ | 43,213 |
Customers accounted for 10% or more of total accounts receivable | The following customers accounted for 10% or more of total accounts receivable:
| At
| June 29, 2013 |  | December 29, 2012
Intel Corporation | 20.2 | % |  | 12.3 | %
SK Hynix | 15.1 | % |  | *** |
Samsung Electronics Co. Ltd. | 14.6 | % |  | *** |
Micron Technology, Inc. | 11.0 | % |  | *** |
Taiwan Semiconductor Mfg. Co. | *** |  |  | 17.3 | %
*** The customer accounted for less than 10% of total accounts receivable for that period.
Customers accounted for 10% or more of total revenue | The following customers accounted for 10% or more of total revenue
| Three Months Ended |  | Six Months Ended
| June 29, 2013 |  | June 30, 2012 |  | June 29, 2013 |  | June 30, 2012
Intel Corporation | 25.1 | % |  | 13.9 | % |  | 26.9 | % |  | 22.1 | %
SK Hynix | 23.4 | % |  | 24.6 | % |  | 14.9 | % |  | 16.8 | %
Samsung Electronics Co. Ltd. | 14.6 | % |  | 34.3 | % |  | 12.3 | % |  | 37.3 | %

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