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Geographic and Product Data (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Apr. 03, 2015 | Apr. 04, 2014
Geographic and Product Data [Line Items] |  |
Net sales | $ 18,858 us-gaap_SalesRevenueNet | $ 20,178 us-gaap_SalesRevenueNet
Japan [Member] |  |
Geographic and Product Data [Line Items] |  |
Net sales | 4,286 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_JP | 5,008 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_JP
United States [Member] |  |
Geographic and Product Data [Line Items] |  |
Net sales | 2,867 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US | 2,874 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US
China [Member] |  |
Geographic and Product Data [Line Items] |  |
Net sales | 2,371 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_CN | 2,225 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_CN
Korea [Member] |  |
Geographic and Product Data [Line Items] |  |
Net sales | 2,343 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_KR | 2,621 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_KR
Spain [Member] |  |
Geographic and Product Data [Line Items] |  |
Net sales | 1,478 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_ES | 1,618 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_ES
France [Member] |  |
Geographic and Product Data [Line Items] |  |
Net sales | 1,150 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_FR | 946 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_FR
Others [Member] |  |
Geographic and Product Data [Line Items] |  |
Net sales | $ 4,363 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = staa_OtherCountriesMember | $ 4,886 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = staa_OtherCountriesMember

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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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