Equipment, Furniture and Leasehold Improvements - Equipment, Furniture and Leasehold Improvements (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Total	$ 2,762	$ 3,431
Less: accumulated depreciation and amortization	(2,510)	(2,520)
Equipment, furniture and leasehold improvements, net	252	911
Computer equipment and software [Member]
Property, Plant and Equipment [Line Items]
Total	1,290	1,637
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Total	262	302
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Total	1,165	1,163
Software Development Costs [Member]
Property, Plant and Equipment [Line Items]
Total	$ 45	$ 329