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Segment, Geographic, Product and Significant Customer Information - Revenue Net (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 24, 2016 | Sep. 30, 2017 | Sep. 24, 2016
Net revenues: |  |  |  |
Total net revenues | $ 56,675 | $ 58,714 | $ 180,416 | $ 161,970
South Korea [Member] |  |  |  |
Net revenues: |  |  |  |
Total net revenues | 22,269 | 15,710 | 72,388 | 35,226
Japan [Member] |  |  |  |
Net revenues: |  |  |  |
Total net revenues | 4,781 | 11,765 | 17,400 | 24,669
United States [Member] |  |  |  |
Net revenues: |  |  |  |
Total net revenues | 6,231 | 8,211 | 28,101 | 24,306
China [Member] |  |  |  |
Net revenues: |  |  |  |
Total net revenues | 3,403 | 7,364 | 17,420 | 33,883
Taiwan [Member] |  |  |  |
Net revenues: |  |  |  |
Total net revenues | 2,304 | 6,334 | 19,016 | 16,962
Singapore [Member] |  |  |  |
Net revenues: |  |  |  |
Total net revenues | 9,774 | 5,078 | 12,229 | 18,645
Other [Member] |  |  |  |
Net revenues: |  |  |  |
Total net revenues | $ 7,913 | $ 4,252 | $ 13,862 | $ 8,279

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + 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=63488584&loc=d3e20235-122688 + Details
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