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Property, Plant and Equipment (Detail) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Leasehold improvements $ 13,557 $ 13,306
Equipment 14,682 13,758
Furniture and fixtures 3,080 2,808
Construction in progress 621 425
Total property, plant and equipment 31,940 30,297
Less: accumulated depreciation (18,233) (16,496)
Property, plant and equipment, net $ 13,707 $ 13,801