Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 14,353	$ 15,527
Accumulated depreciation and amortization	(11,367)	(12,281)
Property and equipment, net	2,986	3,246
Depreciation expense	1,366,000	1,477,000
Impairment charges, property and equipment	$ 138,000	145,000
Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years
Network equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 10,767	11,653
Network equipment and software | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Network equipment and software | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 3,190	2,730
Computer equipment and software | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Computer equipment and software | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	4 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 87	522
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 309	$ 622
Office furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years
Office furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	10 years