Furniture and Fixtures, Equipment and Leasehold Improvements - Schedule of Furniture and Fixtures, Equipment and Leasehold Improvements (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Total gross assets	$ 304	$ 370
Less accumulated depreciation	(268)	(357)
Total furniture and fixtures, equipment and leasehold improvements	36	13
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total gross assets	6	24
Equipment [Member]
Property, Plant and Equipment [Line Items]
Total gross assets	262	297
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total gross assets	$ 36	$ 49