Equipment, Furniture and Leasehold Improvements - Equipment, Furniture and Leasehold Improvements (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Total	$ 4,169	$ 4,044
Less: accumulated depreciation and amortization	(3,002)	(2,708)
Equipment, furniture and leasehold improvements, net	1,167	1,336
Computer equipment and software [Member]
Property, Plant and Equipment [Line Items]
Total	2,667	2,489
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Total	305	343
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Total	$ 1,197	$ 1,212