Property, Plant and Equipment-Net (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 53,972	$ 51,383
Less: accumulated depreciation and amortization	(15,938)	(11,294)
Property, plant and equipment-net	38,034	40,089
Plant equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	29,808	25,918
Building and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	5,807	5,514
Lab equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	7,544	6,445
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	2,637	2,659
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment	4,071	3,387
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment	651	603
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment	430	430
Automobiles
Property, Plant and Equipment [Line Items]
Property, plant and equipment	194	49
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 2,830	$ 6,378