Summary of Significant Accounting Policies - Property and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Total cost	$ 77,700	$ 90,983
Accumulated depreciation and amortization	(36,581)	(33,414)
Property and equipment, net	41,119	57,569
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Total cost	2,540	4,133
Buildings [Member]
Property, Plant and Equipment [Line Items]
Total cost	21,644	26,097
Machinery, Equipment and Tooling [Member]
Property, Plant and Equipment [Line Items]
Total cost	43,275	50,364
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total cost	7,140	7,141
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total cost	805	816
Information Systems [Member]
Property, Plant and Equipment [Line Items]
Total cost	1,115	1,105
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 1,181	$ 1,327