Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 5,982	$ 6,014
Accumulated depreciation and amortization	(4,709)	(4,708)
Total property and equipment, net	1,273	1,306
Equipment, Computer Hardware and Software [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	5,102	5,147
Furniture And Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	433	424
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 447	$ 443