Property, Plant and Equipment-Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 45,799	$ 52,983
Less: accumulated depreciation and amortization	(19,455)	(16,903)
Property, plant and equipment - net	26,344	36,080
Plant equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	24,824	30,213
Building and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	5,810	5,807
Lab equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	7,495	7,904
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	1,876	1,935
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment	4,159	3,936
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment	669	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	$ 342	$ 1,926