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Segment, Geographic, Product and Significant Customer Information - Product Revenues (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 26, 2015 | Dec. 27, 2014
Segment Reporting Information [Line Items] |  |  |
Products | $ 185,066 | $ 146,945 | $ 133,589
Automated Systems [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Products | 127,378 | 102,386 | 108,768
Integrated Systems [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Products | 43,846 | 31,579 | 15,334
Materials Characterization Systems [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Products | $ 13,842 | $ 12,980 | $ 9,487

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- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and 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(a)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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- Details
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