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Geographic and Product Data (Details 1) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 28, 2012 | Dec. 30, 2011 | Dec. 31, 2010
Net sales | $ 63,783 | $ 62,765 | $ 54,958
Implantable Collamer Lenses [Member] |  |  |
Net sales | 35,080 | 32,072 | 24,300
Intraocular Lenses [Member] |  |  |
Net sales | 25,971 | 27,547 | 27,550
Other Surgical Products [Member] |  |  |
Net sales | $ 2,732 | $ 3,146 | $ 3,108

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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=6880815&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
Name: | us-gaap_SalesRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration