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Property, Plant and Equipment (Detail) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Leasehold improvements $ 14,444 $ 13,306
Equipment 14,750 13,758
Furniture and fixtures 3,353 2,808
Construction in progress 1,382 425
Total property, plant and equipment 33,929 30,297
Less: accumulated depreciation (18,994) (16,496)
Property, plant and equipment, net $ 14,935 $ 13,801