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Geographic and Product Data (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 02, 2015		Jan. 03, 2014		Dec. 28, 2012
Geographic and Product Data [Line Items]
Net sales	$ 74,987us-gaap_SalesRevenueNet		$ 72,215us-gaap_SalesRevenueNet		$ 63,783us-gaap_SalesRevenueNet
United States [Member]
Geographic and Product Data [Line Items]
Net sales	11,117us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US		12,851us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US		12,427us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US
Japan [Member]
Geographic and Product Data [Line Items]
Net sales	19,107us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_JP		17,666us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_JP		16,692us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_JP
China [Member]
Geographic and Product Data [Line Items]
Net sales	9,370us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_CN		8,618us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_CN		8,406us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_CN
Korea [Member]
Geographic and Product Data [Line Items]
Net sales	6,563us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_KR		7,743us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_KR		6,713us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_KR
Spain [Member]
Geographic and Product Data [Line Items]
Net sales	5,562us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_ES		4,867us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_ES		3,026us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_ES
France [Member]
Geographic and Product Data [Line Items]
Net sales	3,696us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_FR		2,546us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_FR		1,612us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_FR
Others [Member]
Geographic and Product Data [Line Items]
Net sales	$ 19,572us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = staa_OtherCountriesMember	[1]	$ 17,924us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = staa_OtherCountriesMember	[1]	$ 14,907us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = staa_OtherCountriesMember	[1]
[1] No other location individually exceeds 5% of total sales.

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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

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