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Intangible Assets - Estimated Future Amortization Expense for Purchased Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
Jan. 03, 2015
Dec. 28, 2013
Estimated future amortization expense for purchased intangible assets    
2015 $ 53us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths  
2016 99us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
2017 16us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
2018 16us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
2019 16us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
Thereafter 84us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive  
Net Carrying Value $ 284us-gaap_FiniteLivedIntangibleAssetsNet $ 328us-gaap_FiniteLivedIntangibleAssetsNet