Property, Plant and Equipment-Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 46,607	$ 45,404
Less: accumulated depreciation and amortization	(22,645)	(19,408)
Property, plant and equipment-net	23,962	25,996
Plant equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	25,233	24,824
Building and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	5,811	5,810
Lab equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	7,491	7,495
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	2,602	1,866
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment	3,968	3,988
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment	566	539
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	$ 312	$ 258