Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment, Net - Summary of Estimated Useful Lives of Property and Equipment (Parenthetical) (Detail)

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Property and Equipment, Net - Summary of Estimated Useful Lives of Property and Equipment (Parenthetical) (Detail) (Leasehold Improvements [Member])
9 Months Ended
Sep. 28, 2013
Property, Plant and Equipment [Line Items]  
Description of estimated useful life of property and equipment The estimated useful life is the lesser of 3-5 years or the lease term.
Minimum [Member]
 
Property, Plant and Equipment [Line Items]  
Estimated useful life of property and equipment 3 years
Maximum [Member]
 
Property, Plant and Equipment [Line Items]  
Estimated useful life of property and equipment 5 years