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Stock-Based Compensation (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Apr. 03, 2015 | Apr. 04, 2014
Schedule of Employee Service Share-based Compensation [Line Items] |  |
Share-based Compensation | $ 994 us-gaap_ShareBasedCompensation | $ 1,500 us-gaap_ShareBasedCompensation
Employee stock options [Member] |  |
Schedule of Employee Service Share-based Compensation [Line Items] |  |
Share-based Compensation | 725 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember | 859 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
Restricted stock [Member] |  |
Schedule of Employee Service Share-based Compensation [Line Items] |  |
Share-based Compensation | 271 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | 299 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember
Restricted stock units [Member] |  |
Schedule of Employee Service Share-based Compensation [Line Items] |  |
Share-based Compensation | 129 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 398 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Nonemployee stock options [Member] |  |
Schedule of Employee Service Share-based Compensation [Line Items] |  |
Share-based Compensation | $ (7)us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = staa_NonemployeeStockOptionsMember | $ 22 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = staa_NonemployeeStockOptionsMember

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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 + Details
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