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Geographic and Significant Customer Information (Tables) | 9 Months Ended
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Sep. 27, 2014
Segment Reporting [Abstract] |
Total net revenue | 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 |  | Nine Months Ended
| September 27, 2014 |  | September 28, 2013 |  | September 27, 2014 |  | September 28, 2013
United States | $ | 5,511 |  |  | $ | 15,665 |  |  | $ | 25,554 |  |  | $ | 41,426 |
Japan | 4,099 |  |  | 2,387 |  |  | 10,005 |  |  | 9,617 |
Taiwan | 640 |  |  | 3,737 |  |  | 11,337 |  |  | 6,959 |
China | 2,848 |  |  | 901 |  |  | 27,694 |  |  | 6,952 |
South Korea | 6,327 |  |  | 9,805 |  |  | 30,589 |  |  | 18,946 |
Other | 7,708 |  |  | 6,549 |  |  | 21,559 |  |  | 14,248 |
Total net revenues | $ | 27,133 |  |  | $ | 39,044 |  |  | $ | 126,738 |  |  | $ | 98,148 |
Long-lived tangible assets |
| At
| September 27, 2014 |  | December 28, 2013
United States | $ | 50,061 |  |  | $ | 44,775 |
Japan | 82 |  |  | 125 |
South Korea | 337 |  |  | 445 |
All Other | 256 |  |  | 2,094 |
Total long-lived tangible assets | $ | 50,736 |  |  | $ | 47,439 |
Customers accounted for 10% or more of total accounts receivable | The following customers accounted for 10% or more of total accounts receivable as of the following dates:
| September 27, 2014 |  | December 28, 2013
SK Hynix | 26 | % |  | 22 | %
Taiwan Semiconductor Mfg. Co. | *** |  |  | 12 | %
Global Foundries | 14 | % |  | *** |
Samsung Electronics Co. Ltd. | *** |  |  | 27 | %
Intel Corporation | *** |  |  | 14 | %
Micron Technology, Inc. | 12 | % |  | *** |
*** The customer accounted for less than 10% of total accounts receivable as of that period end.
Customers accounted for 10% or more of total revenue | The following customers accounted for 10% or more of total net revenues:
| Three Months Ended |  | Nine Months Ended
| September 27, 2014 |  | September 28, 2013 |  | September 27, 2014 |  | September 28, 2013
Intel Corporation | *** |  |  | 34 | % |  | 14 | % |  | 30 | %
SK Hynix | 27 | % |  | 23 | % |  | 16 | % |  | 18 | %
Samsung Electronics Co. Ltd. | *** |  |  | *** |  |  | 28 | % |  | *** |
Micron Technology, Inc. | 25 | % |  | *** |  |  | *** |  |  | *** |
*** The customer accounted for less than 10% of total net revenues for that period.

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- Definition Tabular disclosure of the names of foreign countries from which revenue is material and the amount of revenue from external customers attributed to those countries. An entity may also provide subtotals of geographic information about groups of countries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 + Details
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- Definition Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 + Details
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