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Employee Benefit Plans (Details 2) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 28, 2012 | Dec. 30, 2011
Actuarial gain (loss) of current year | $ (51) | $ 238
Actuarial (loss) income recorded in current year | 42 | 75
Change in other comprehensive loss | $ (9) | $ 313

X
- Definition Reflects the amount of actuarial loss or income recorded in current year. + References No definition available. + Details
Name: | staa_ComprehensiveIncomeActuarialLossRecorded
Namespace Prefix: | staa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Reflects the net change in other comprehensive loss. + References No definition available. + Details
Name: | staa_ComprehensiveIncomeChange
Namespace Prefix: | staa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Reflects the amount of actuarial loss of current year. + References No definition available. + Details
Name: | staa_OtherComprehensiveIncomeLossActuarialLossOfCurrentYear
Namespace Prefix: | staa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration