Property and Equipment, Net (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment - gross	$ 167,441	$ 168,262
Less accumulated depreciation	(120,616)	(119,513)
Total property and equipment - net	46,825	48,749
Land
Property, Plant and Equipment [Line Items]
Property and equipment - gross	3,435	3,435
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment - gross	$ 21,590	21,590
Buildings | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (Years)	39 years
Buildings | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (Years)	40 years
Building Improvements
Property, Plant and Equipment [Line Items]
Property and equipment - gross	$ 60,584	60,584
Building Improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (Years)	5 years
Building Improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (Years)	40 years
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Property and equipment - gross	$ 67,996	68,434
Machinery and Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (Years)	3 years
Machinery and Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (Years)	15 years
Furniture, fixtures and office equipment
Property, Plant and Equipment [Line Items]
Property and equipment - gross	$ 4,114	4,114
Furniture, fixtures and office equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (Years)	5 years
Furniture, fixtures and office equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life (Years)	10 years
Computer Equipment and Software
Property, Plant and Equipment [Line Items]
Estimated Useful Life (Years)	3 years
Property and equipment - gross	$ 9,519	9,519
Construction in Progress
Property, Plant and Equipment [Line Items]
Property and equipment - gross	$ 203	$ 586