Property and Equipment, net (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 5,998	$ 6,014
Accumulated depreciation and amortization	(4,782)	(4,708)
Property and equipment, net	1,216	1,306
Equipment, Computer Hardware and Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	5,124	5,147
Furniture And Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	433	424
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 441	$ 443