Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets, Net - Summary of Intangible Assets (Detail)

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Intangible Assets, Net - Summary of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Sep. 27, 2014
Dec. 28, 2013
Sep. 27, 2014
Product design intellectual property
Dec. 28, 2013
Product design intellectual property
Sep. 27, 2014
Patent license agreement
Dec. 28, 2013
Patent license agreement
Sep. 27, 2014
Domain and trade names
Dec. 28, 2013
Domain and trade names
Sep. 28, 2013
Minimum
Product design intellectual property
Sep. 27, 2014
Minimum
Patent license agreement
Sep. 28, 2013
Maximum
Product design intellectual property
Sep. 27, 2014
Maximum
Patent license agreement
Finite-Lived Intangible Assets [Line Items]                        
Finite-lived intangible assets, useful life     4 years       10 years   4 years 3 years 9 years 5 years
Finite-lived intangible assets, gross carrying amount $ 4,486 $ 3,949 $ 2,750 [1] $ 2,750 [1] $ 537 $ 0 $ 1,199 $ 1,199        
Finite-lived intangible assets, accumulated amort. and impairment (2,664) (2,348) (2,037) [1] (1,842) [1] (64) 0 (563) (506)        
Total $ 1,822 $ 1,601 $ 713 [1] $ 908 [1] $ 473 $ 0 $ 636 $ 693        
[1] During the second quarter of 2013, based on the impairment analysis, the Company changed its estimated useful life for product design and intellectual property from 9 years to 4 years.