Summary of Significant Accounting Policies - Property and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Total cost	$ 91,532	$ 90,983
Accumulated depreciation and amortization	(35,056)	(33,414)
Property and equipment, net	56,476	57,569
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Total cost	4,133	4,133
Buildings [Member]
Property, Plant and Equipment [Line Items]
Total cost	26,103	26,097
Machinery, Equipment and Tooling [Member]
Property, Plant and Equipment [Line Items]
Total cost	50,969	50,364
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total cost	7,141	7,141
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total cost	816	816
Information Systems [Member]
Property, Plant and Equipment [Line Items]
Total cost	1,121	1,105
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 1,249	$ 1,327