Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets, Net - Additional Information (Detail)

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Intangible Assets, Net - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 27, 2014
Sep. 28, 2013
Goodwill And Intangible Assets Disclosure Textual [Abstract]        
Amortization expense relating to intangibles assets $ 106 $ 86 $ 316 $ 299