Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, cost	$ 179	$ 382
Property and equipment, accumulated amortization	90	277
Property and equipment, net book Value	89	105
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, cost	48	143
Property and equipment, accumulated amortization	42	110
Property and equipment, net book Value	6	33
Office Furniture, Equipment and Systems [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, cost	131	239
Property and equipment, accumulated amortization	48	167
Property and equipment, net book Value	$ 83	$ 72