Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity and Share-Based Compensation - Summary of Share-based Compensation from Options, Warrants, RSUs and Stock Awards (Detail)

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Stockholders' Equity and Share-Based Compensation - Summary of Share-based Compensation from Options, Warrants, RSUs and Stock Awards (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 29, 2014
Mar. 30, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]    
Share-based compensation expense $ 376 $ 409
Marketing expense [Member]
    
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]    
Share-based compensation expense 81 84
General and administrative expense [Member]
    
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]    
Share-based compensation expense 237 282
Fulfillment expense [Member]
    
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]    
Share-based compensation expense 39 31
Technology expense [Member]
    
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]    
Share-based compensation expense $ 19 $ 12