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Accrued Expenses (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 29, 2014
Dec. 28, 2013
Accrued Liabilities, Current [Abstract]    
Document Period End Date Mar. 29, 2014  
Accounts Payable, Current [Abstract]    
Accrued warranty $ 6,358 $ 6,497
Accrued Sales Tax 759 831
Accrued rent 720 726
Accrued direct fulfillment costs 670 1,362
Accrued sales commissions 247 539
Accrued accounting fees 323 181
Accrued contractors, current 298 509
Accrued other 4,188 4,235
Accrued expenses 13,563 14,880
Employee-related Liabilities, Current $ 7,744 $ 19,606