PRINCIPAL CLIENTS (Tables)

6 Months Ended

Jun. 30, 2014

Risks and Uncertainties [Abstract]

Schedule of Revenue by Major Customers

The following table represents revenue concentration of our principal clients:

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014				2013
	Revenue	Percentage	Revenue	Percentage	Revenue		Percentage		Revenue		Percentage
T-Mobile USA, Inc., a subsidiary of Deutsche Telekom (2)	$18,785	30.7%	$15,042	27.1%	$	37,424	30.1	%	$	28,377	25.9	%
AT&T Services, Inc. and AT&T Mobility, LLC, subsidiaries of AT&T, Inc. (1)	$13,753	22.5%	$14,599	26.3%	$	29,097	23.4	%	$	27,902	25.5	%
Comcast Cable Communications Management, LLC, subsidiary of Comcast Corporation (2)	$10,777	17.6%	$11,123	20.0%	$	21,737	17.5	%	$	22,479	20.6	%

(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.