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Income Taxes (Details Textual) (USD $)
 12 Months Ended 3 Months Ended
Jan. 02, 2015
Jan. 03, 2014
Dec. 28, 2012
Jan. 02, 2015
Jan. 03, 2015
Income Taxes [Line Items]          
Income Tax Expense (Benefit) $ (253,000)us-gaap_IncomeTaxExpenseBenefit $ 716,000us-gaap_IncomeTaxExpenseBenefit $ 1,244,000us-gaap_IncomeTaxExpenseBenefit    
Operating Loss Carryforwards 130,800,000us-gaap_OperatingLossCarryforwards     130,800,000us-gaap_OperatingLossCarryforwards 131,000,000us-gaap_OperatingLossCarryforwards
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount   1,008,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount 433,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount    
Taxes Payable 217,000us-gaap_TaxesPayableCurrentAndNoncurrent 655,000us-gaap_TaxesPayableCurrentAndNoncurrent   217,000us-gaap_TaxesPayableCurrentAndNoncurrent  
Deferred Tax Assets, Operating Loss Carryforwards, State and Local 73,700,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal     73,700,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal  
Operating Loss Carryforwards, Valuation Allowance   71,000us-gaap_OperatingLossCarryforwardsValuationAllowance 48,000us-gaap_OperatingLossCarryforwardsValuationAllowance   394,000us-gaap_OperatingLossCarryforwardsValuationAllowance
Increase Decrease In Foreign Deferred Tax Asset   630,000staa_IncreaseDecreaseInForeignDeferredTaxAsset 16,000staa_IncreaseDecreaseInForeignDeferredTaxAsset    
Operating Loss Carryforwards, Limitations on Use The California net operating loss carryforwards expire in varying amounts between 2015 and 2034 and, approximately $16.3 million of those net operating loss carryforwards, will expire over the next three years.        
Deferred State and Local Income Tax Expense (Benefit) 15,000us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit 12,000us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit 11,000us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit    
Operating Loss Carry Forwards Expiration Term expire in varying amounts between 2017 and 2033.        
Increase Decrease In Foreign Deferred Tax Liabilities 1,039,000staa_IncreaseDecreaseInForeignDeferredTaxLiabilities        
Defined Benefit Plan Switzerland [Member]          
Income Taxes [Line Items]          
Deferred Tax Assets, Net   1,683,000us-gaap_DeferredTaxAssetsLiabilitiesNet
/ us-gaap_StatementGeographicalAxis
= staa_DefinedBenefitPlanSwitzerlandMember		      
Deferred Tax Liabilities, Net 1,371,000us-gaap_DeferredTaxLiabilities
/ us-gaap_StatementGeographicalAxis
= staa_DefinedBenefitPlanSwitzerlandMember		     1,371,000us-gaap_DeferredTaxLiabilities
/ us-gaap_StatementGeographicalAxis
= staa_DefinedBenefitPlanSwitzerlandMember		  
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries 1,326,000us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries
/ us-gaap_StatementGeographicalAxis
= staa_DefinedBenefitPlanSwitzerlandMember		 1,129,000us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries
/ us-gaap_StatementGeographicalAxis
= staa_DefinedBenefitPlanSwitzerlandMember		   1,326,000us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries
/ us-gaap_StatementGeographicalAxis
= staa_DefinedBenefitPlanSwitzerlandMember		  
Japan [Member]          
Income Taxes [Line Items]          
Operating Loss Carryforwards   20,000us-gaap_OperatingLossCarryforwards
/ us-gaap_StatementGeographicalAxis
= staa_JapanMember		      
Deferred Tax Assets, Net 658,000us-gaap_DeferredTaxAssetsLiabilitiesNet
/ us-gaap_StatementGeographicalAxis
= staa_JapanMember		 289,000us-gaap_DeferredTaxAssetsLiabilitiesNet
/ us-gaap_StatementGeographicalAxis
= staa_JapanMember		   658,000us-gaap_DeferredTaxAssetsLiabilitiesNet
/ us-gaap_StatementGeographicalAxis
= staa_JapanMember		  
Swiss Operations [Member]          
Income Taxes [Line Items]          
Income Tax Expense (Benefit)       $ 1,400,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementGeographicalAxis
= staa_SwissOperationsMember