Property and Equipment - Summarized Category of Fixed Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, plant & equipment, gross	$ 6,512	$ 6,276
Less accumulated depreciation	(2,100)	(2,014)
Total property, plant & equipment, net	4,412	4,262
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant & equipment, gross	580	580
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant & equipment, gross	460	460
Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant & equipment, gross	200	200
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant & equipment, gross	53	53
Idle Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant & equipment, gross	$ 5,219	$ 4,983