PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Accumulated depreciation and amortization		$ (9,003)	$ (8,969)
Property and equipment, net		$ 3,891	3,302
Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		3 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		15 years
Switches [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 9,346	8,606
Switches [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		3 years
Switches [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		15 years
Computers [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		3 years
Property and equipment, gross		$ 2,621	2,707
Furniture [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 160	257
Furniture [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		5 years
Furniture [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		7 years
Leasehold-improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	[1]	$ 767	$ 701

[1] The estimated useful life for leasehold improvements is the shorter of the term of the lease or life of the asset.