Equipment, Furniture and Leasehold Improvements - Equipment, Furniture, and Leasehold Improvements (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Total	$ 3,973	$ 5,287
Less: accumulated depreciation and amortization	(3,562)	(4,528)
Equipment, furniture and leasehold improvements, net	411	759
Computer equipment and software [Member]
Property, Plant and Equipment [Line Items]
Total	2,520	2,964
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Total	536	1,365
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Total	$ 917	$ 958