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Commitments and Contingencies (Details Textual)	1 Months Ended
	Dec. 28, 2012 Mizuho Bank [Member] USD ($)	Dec. 28, 2012 Mizuho Bank [Member] CNY	Apr. 03, 2015 Mizuho Bank [Member] USD ($)	Apr. 03, 2015 Mizuho Bank [Member] CNY	Jan. 02, 2015 Mizuho Bank [Member] USD ($)	Jan. 02, 2015 Mizuho Bank [Member] CNY	Dec. 28, 2012 Mizuho Bank [Member] Prime Rate [Member]	Apr. 03, 2015 Credit Suisse [Member] USD ($)	Jan. 02, 2015 Credit Suisse [Member] USD ($)	Aug. 31, 2010 Credit Suisse [Member] USD ($)	Aug. 31, 2010 Credit Suisse [Member] CHF
Loss Contingencies [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 4,200,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_ShortTermDebtTypeAxis = staa_MizuhoBankMember	500,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_ShortTermDebtTypeAxis = staa_MizuhoBankMember								$ 1,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_ShortTermDebtTypeAxis = staa_CreditSuisseMember	1,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_ShortTermDebtTypeAxis = staa_CreditSuisseMember
Line of Credit Facility, Interest Rate at Period End							1.475%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd / us-gaap_ShortTermDebtTypeAxis = staa_MizuhoBankMember / us-gaap_VariableRateAxis = us-gaap_PrimeRateMember
Long-term Line of Credit			$ 4,200,000us-gaap_LineOfCredit / us-gaap_ShortTermDebtTypeAxis = staa_MizuhoBankMember	500,000,000us-gaap_LineOfCredit / us-gaap_ShortTermDebtTypeAxis = staa_MizuhoBankMember	$ 4,200,000us-gaap_LineOfCredit / us-gaap_ShortTermDebtTypeAxis = staa_MizuhoBankMember	500,000,000us-gaap_LineOfCredit / us-gaap_ShortTermDebtTypeAxis = staa_MizuhoBankMember		$ 0us-gaap_LineOfCredit / us-gaap_ShortTermDebtTypeAxis = staa_CreditSuisseMember	$ 0us-gaap_LineOfCredit / us-gaap_ShortTermDebtTypeAxis = staa_CreditSuisseMember
Debt Instrument, Maturity Date	Jun. 30, 2015	Jun. 30, 2015

X

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The effective interest rate at the end of the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration