Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment, Net - Summary of Property and Equipment (Detail)

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Property and Equipment, Net - Summary of Property and Equipment (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 27, 2014
Dec. 28, 2013
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 83,376 $ 82,207
Less accumulated depreciation, amortization and impairment (66,055) (62,544)
Property and equipment, net 17,321 19,663
Land
    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 630 630
Building
    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 8,877 8,877
Machinery and equipment
    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 10,329 12,163
Computer equipment
    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 58,876 55,383
Vehicles
    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 250 264
Leasehold improvements
    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 1,758 1,767
Furniture and fixtures
    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 1,035 1,057
Construction in process
    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 1,621 $ 2,066