Equipment, Furniture and Leasehold Improvements - Equipment, Furniture and Leasehold Improvements (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Total	$ 4,044	$ 3,973
Less: accumulated depreciation and amortization	(2,708)	(3,562)
Equipment, furniture and leasehold improvements, net	1,336	411
Computer equipment and software [Member]
Property, Plant and Equipment [Line Items]
Total	2,489	2,520
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Total	343	536
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Total	$ 1,212	$ 917