Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 776	$ 5,876
Accumulated depreciation and amortization	(674)	(4,888)
Total property and equipment	102	988
Less assets held for sale		(911)
Total property and equipment, net	102	77
Equipment, Computer Hardware And Software [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	314	5,005
Furniture And Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	350	433
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 112	$ 438