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Stockholders' Equity (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 02, 2015	Jan. 03, 2014	Dec. 28, 2012
Schedule of Employee Service Share-based Compensation [Line Items]
Share-based Compensation, Total	$ 4,663us-gaap_ShareBasedCompensation	$ 4,489us-gaap_ShareBasedCompensation	$ 3,208us-gaap_ShareBasedCompensation
Employee stock options [Member]
Schedule of Employee Service Share-based Compensation [Line Items]
Share-based Compensation, Total	2,842us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember	2,683us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember	2,595us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
Restricted stock [Member]
Schedule of Employee Service Share-based Compensation [Line Items]
Share-based Compensation, Total	935us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember	999us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember	590us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember
Restricted stock units [Member]
Schedule of Employee Service Share-based Compensation [Line Items]
Share-based Compensation, Total	795us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember	589us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember	0us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Consultant compensation [Member]
Schedule of Employee Service Share-based Compensation [Line Items]
Share-based Compensation, Total	$ 91us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = staa_ConsultantsStockMember	$ 218us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = staa_ConsultantsStockMember	$ 23us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = staa_ConsultantsStockMember

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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