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Property, Plant and Equipment (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Land $ 1,023 $ 1,023
Buildings 989 764
Leasehold improvements 29,776 23,905
Equipment 39,094 36,257
Furniture, fixtures and office equipment 8,055 6,312
Computer hardware and software 14,468 8,810
Construction in progress 6,416 6,707
Other 348 56
Total property, plant and equipment 100,169 83,834
Less - Accumulated depreciation (44,814) (35,379)
Total property, plant and equipment, net $ 55,355 $ 48,455