Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies and Nature of Operations - Additional Information (Detail)

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Summary of Significant Accounting Policies and Nature of Operations - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 28, 2014
Jun. 29, 2013
Jun. 28, 2014
Segment
Jun. 29, 2013
Dec. 28, 2013
Dec. 29, 2012
Schedule Of Significant Accounting Policies [Line Items]            
Net income (loss) $ (2,180) $ (9,567) $ (1,979) $ (12,910) $ (15,634) $ (35,978)
Revenues 76,947 67,889 144,975 133,294    
Other than temporary impairment charges on investments     0 0    
Derivatives designated as hedging instruments in accumulated other comprehensive loss     22      
Reclassification of net losses from accumulated other comprehensive loss 7          
Recognized ineffective portion derivatives 0          
Expected reclassified net losses to other income/expense     22      
Derivative, notional value 3,520   3,520      
Inventory 35,178   35,178   36,986  
Inventory in-transit 8,873   8,873   6,750  
Impairment losses on property and equipment 0 4,832 0 4,832    
Impairment losses on intangible assets   0        
Limited warranty description     The Company or the vendors supplying its products provide the Company's customers limited warranties on certain products that range from 30 days to lifetime.      
Standard product warranty useful life, minimum     1 year      
Standard product warranty useful life, maximum     5 years      
Extended product warranty description     The product brands that include the extended warranty coverage are offered at three different service levels (a) a five year unlimited product replacement, (b) a five year one-time product replacement, and (c) a three year one-time product replacement.      
Advertising costs 5,013 4,571 9,402 8,908    
The likeliness that the tax position will be realized upon ultimate settlement     50.00%      
Unrecognized tax benefits, interest or penalties $ 0   $ 0      
Number of reportable segments     2      
Website and Software Development [Member]
            
Schedule Of Significant Accounting Policies [Line Items]            
Capitalization amount amortized on straight-line basis over a period     2 years      
Maximum [Member]
            
Schedule Of Significant Accounting Policies [Line Items]            
Original maturity of money market funds and short-term investments purchased     90 days      
Stock option grant, vesting period     4 years      
Minimum [Member]
            
Schedule Of Significant Accounting Policies [Line Items]            
Stock option grant, vesting period     3 years