Property, Plant and Equipment-Net (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 39,793	$ 38,499
Less: accumulated depreciation and amortization	(7,403)	(6,274)
Property, plant and equipment-net	32,390	32,225
Plant equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	18,670	18,670
Building and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	5,478	5,478
Lab equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	6,019	5,808
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	2,672	2,665
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment	2,684	2,681
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment	589	589
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment	430	430
Automobiles
Property, Plant and Equipment [Line Items]
Property, plant and equipment	49	49
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 3,202	$ 2,129