PRINCIPAL CLIENTS (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended				9 Months Ended				0 Months Ended	3 Months Ended				9 Months Ended				3 Months Ended		9 Months Ended
	Jul. 28, 2011 T-Mobile USA, Inc., a subsidiary of Deutsche Telekom	Sep. 30, 2014 T-Mobile USA, Inc., a subsidiary of Deutsche Telekom	Sep. 30, 2013 T-Mobile USA, Inc., a subsidiary of Deutsche Telekom	Sep. 30, 2014 T-Mobile USA, Inc., a subsidiary of Deutsche Telekom	Sep. 30, 2013 T-Mobile USA, Inc., a subsidiary of Deutsche Telekom	Sep. 30, 2014 AT&T Services, Inc. and AT&T Mobility, LLC, subsidiaries of AT&T Inc.		Sep. 30, 2013 AT&T Services, Inc. and AT&T Mobility, LLC, subsidiaries of AT&T Inc.		Sep. 30, 2014 AT&T Services, Inc. and AT&T Mobility, LLC, subsidiaries of AT&T Inc.		Sep. 30, 2013 AT&T Services, Inc. and AT&T Mobility, LLC, subsidiaries of AT&T Inc.		Jan. 04, 2014 Comcast Cable Communications Management LLC, subsidiary of Comcast Corporation	Sep. 30, 2014 Comcast Cable Communications Management LLC, subsidiary of Comcast Corporation		Sep. 30, 2013 Comcast Cable Communications Management LLC, subsidiary of Comcast Corporation		Sep. 30, 2014 Comcast Cable Communications Management LLC, subsidiary of Comcast Corporation		Sep. 30, 2013 Comcast Cable Communications Management LLC, subsidiary of Comcast Corporation		Sep. 30, 2014 Time Warner Cable Inc.		Sep. 30, 2014 Time Warner Cable Inc.
Revenue, Major Customers [Line Items]
Revenue		$ 19,594	$ 16,469	$ 57,018	$ 44,846	$ 13,598	[1]	$ 14,868	[1]	$ 42,695	[1]	$ 42,770	[1]		$ 9,087	[2]	$ 10,822	[2]	$ 30,824	[2]	$ 33,301	[2]	$ 6,800	[2]	$ 19,896	[2]
Revenue concentration, percentage		31.90%	28.20%	30.70%	26.70%	22.10%	[1]	25.40%	[1]	23.00%	[1]	25.50%	[1]		14.80%	[2]	18.50%	[2]	16.60%	[2]	19.80%	[2]	11.10%	[2]	10.70%	[2]
Initial term of the master service agreement	5 years													1 year
Master services agreement, renewal term	1 year													1 year
Notice of termination option of the initial term	90 days													90 days

[1] Revenue from this customer is generated through our Domestic and Asia Pacific segments.

[2] Revenue from this customer is generated through our Domestic, Asia Pacific and Latin America segments.