Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 14,456		$ 15,152
Accumulated depreciation	(11,589)		(10,896)
Property and equipment, Net	2,867		4,256
Depreciation expense	1,602		1,771
Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Network equipment and software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	10,151		11,091
Network equipment and software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Network equipment and software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Computer equipment and software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	2,514		2,388
Computer equipment and software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Computer equipment and software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	4 years
Collaboration equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	497		497
Estimated useful life	5 years
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	525	[1]	366	[1]
Leasehold improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 769		$ 810
Office furniture and equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Office furniture and equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years

[1] Depreciated over the shorter period of the estimated useful life (five years) or the lease term.