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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 02, 2015	Jan. 03, 2014	Dec. 28, 2012
Current tax provision:
U.S. federal (benefit)	$ 3us-gaap_CurrentFederalTaxExpenseBenefit	$ (121)us-gaap_CurrentFederalTaxExpenseBenefit	$ 0us-gaap_CurrentFederalTaxExpenseBenefit
State	15us-gaap_CurrentStateAndLocalTaxExpenseBenefit	12us-gaap_CurrentStateAndLocalTaxExpenseBenefit	11us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Foreign	570us-gaap_CurrentForeignTaxExpenseBenefit	721us-gaap_CurrentForeignTaxExpenseBenefit	1,125us-gaap_CurrentForeignTaxExpenseBenefit
Total current provision	588us-gaap_CurrentIncomeTaxExpenseBenefit	612us-gaap_CurrentIncomeTaxExpenseBenefit	1,136us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred tax provision (benefit):
U.S. federal and state	0us-gaap_DeferredFederalIncomeTaxExpenseBenefit	0us-gaap_DeferredFederalIncomeTaxExpenseBenefit	0us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Foreign provision (benefit)	(841)us-gaap_DeferredForeignIncomeTaxExpenseBenefit	104us-gaap_DeferredForeignIncomeTaxExpenseBenefit	108us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Total deferred provision (benefit)	(841)us-gaap_DeferredIncomeTaxExpenseBenefit	104us-gaap_DeferredIncomeTaxExpenseBenefit	143us-gaap_DeferredIncomeTaxExpenseBenefit
Provision (benefit) for income taxes	$ (253)us-gaap_IncomeTaxExpenseBenefit	$ 716us-gaap_IncomeTaxExpenseBenefit	$ 1,244us-gaap_IncomeTaxExpenseBenefit

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