Property, Plant and Equipment-Net (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 51,383	$ 38,499
Less: accumulated depreciation and amortization	(11,294)	(6,274)
Property, plant and equipment - net	40,089	32,225
Plant equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	25,918	18,670
Building and improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	5,514	5,478
Lab equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	6,445	5,808
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	2,659	2,665
Computer equipment and software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	3,387	2,681
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	603	589
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	430	430
Automobiles [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	49	49
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 6,378	$ 2,129