Quarterly report pursuant to Section 13 or 15(d)

Estimated Useful Lives of Property and Equipment (Detail)

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Estimated Useful Lives of Property and Equipment (Detail)
9 Months Ended
Sep. 30, 2015
Motor Vehicles  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, Useful Life 5 years
Leasehold Improvements  
Property, Plant and Equipment [Line Items]  
Leasehold improvements Lesser of lease term or estimated useful life
Minimum | Machinery and Equipment  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, Useful Life 3 years
Minimum | Furniture and Fixtures  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, Useful Life 5 years
Minimum | Computers And Software  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, Useful Life 3 years
Maximum | Machinery and Equipment  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, Useful Life 7 years
Maximum | Furniture and Fixtures  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, Useful Life 7 years
Maximum | Computers And Software  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, Useful Life 7 years