XML 82 R60.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Income Taxes (Details 3) | 12 Months Ended
--- | ---
Dec. 29, 2017
Switzerland [Member] |
Income Tax Examination, Year under Examination | 2016
Maximum [Member] | US Federal [Member] |
Income Tax Examination, Year under Examination | 2016
Maximum [Member] | California [Member] |
Income Tax Examination, Year under Examination | 2016
Maximum [Member] | Japan [Member] |
Income Tax Examination, Year under Examination | 2016
Minimum [Member] | US Federal [Member] |
Income Tax Examination, Year under Examination | 2014
Minimum [Member] | California [Member] |
Income Tax Examination, Year under Examination | 2013
Minimum [Member] | Switzerland [Member] |
Income Tax Examination, Year under Examination | 2015

X
- Definition Tax year being audited in the income tax examination, in CCYY format. + References No definition available. + Details
Name: | us-gaap_IncomeTaxExaminationYearUnderExamination
Namespace Prefix: | us-gaap_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementGeographicalAxis=staa_DefinedBenefitPlanSwitzerlandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=staa_UsFederalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=staa_CaliforniaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=staa_JapanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |