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Geographic and Product Data (Details 1) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Jan. 03, 2014 | Dec. 28, 2012 | Dec. 30, 2011
Geographic and Product Data [Line Items] |  |  |
Net sales | $ 72,215 | $ 63,783 | $ 62,765
Implantable Collamer Lenses [Member] |  |  |
Geographic and Product Data [Line Items] |  |  |
Net sales | 44,128 | 35,080 | 32,072
Intraocular Lenses [Member] |  |  |
Geographic and Product Data [Line Items] |  |  |
Net sales | 24,153 | 25,971 | 27,547
Other Surgical Products [Member] |  |  |
Geographic and Product Data [Line Items] |  |  |
Net sales | $ 3,934 | $ 2,732 | $ 3,146

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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=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 + Details
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