Property, Plant and Equipment-Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 52,955	$ 52,983
Less: accumulated depreciation and amortization	(20,836)	(16,903)
Property, plant and equipment-net	32,119	36,080
Plant equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	30,885	30,213
Building and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	5,817	5,807
Lab equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	7,359	7,904
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	1,889	1,935
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment	3,937	3,936
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment	649	638
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	194
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 1,795	$ 1,926