Property Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 997	$ 969
Accumulated depreciation and amortization	(754)	(588)
Total property, plant and equipment	243	381
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	135	107
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	63	63
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	240	240
Software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 559	$ 559