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Stock-Based Compensation (Details Textual) (USD $) | 3 Months Ended |
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Apr. 03, 2015 | Jan. 02, 2015
Schedule of Employee Service Share-based Compensation [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning Balance | 3,620,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 3,175,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Common stock, shares outstanding | 38,790,000 us-gaap_CommonStockSharesOutstanding | 38,429,000 us-gaap_CommonStockSharesOutstanding
Estimated Forfeiture Rate | 6.92%staa_EstimatedForfeitureRate |
Warrants And Rights Exercisable | 700,000 staa_WarrantsAndRightsExercisable |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant |  | 700,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Restricted Stock [Member] |  |
Schedule of Employee Service Share-based Compensation [Line Items] |  |
Common stock, shares outstanding | 156,763 us-gaap_CommonStockSharesOutstanding / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 1,662,958 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |
Restricted Stock [Member] | Maximum [Member] |  |
Schedule of Employee Service Share-based Compensation [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 4 years |
Restricted Stock [Member] | Minimum [Member] |  |
Schedule of Employee Service Share-based Compensation [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 1 year |
Restricted Stock Units (RSUs) [Member] |  |
Schedule of Employee Service Share-based Compensation [Line Items] |  |
Common stock, shares outstanding | 135,500 us-gaap_CommonStockSharesOutstanding / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
2003 Stock Option Plan [Member] |  |
Schedule of Employee Service Share-based Compensation [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning Balance | 3,619,790 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = staa_TwoZeroZeroThreePlanMember |
Lower Range of Exercise Prices | 0.95 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_PlanNameAxis = staa_TwoZeroZeroThreePlanMember |
Upper Range of Exercise Prices | 17.62 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_PlanNameAxis = staa_TwoZeroZeroThreePlanMember |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period | 10 years |

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- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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