PRINCIPAL CLIENTS (Tables)

6 Months Ended

Jun. 30, 2015

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,
	2015				2014				2015				2014
	Revenue		Percentage		Revenue		Percentage		Revenue		Percentage		Revenue		Percentage
T-Mobile USA, Inc., a subsidiary of Deutsche Telekom (2)	$	17,033	26.8	%	$	18,785	30.7	%	$	35,123	27.6	%	$	37,424	30.1	%
AT&T Services, Inc. and AT&T Mobility, LLC, subsidiaries of AT&T, Inc. (1)	$	8,070	12.7	%	$	13,753	22.5	%	$	18,810	14.8	%	$	29,097	23.4	%
Comcast Cable Communications Management, LLC, subsidiary of Comcast Corporation (2)	$	7,930	12.5	%	$	10,777	17.6	%	$	16,809	13.2	%	$	21,737	17.5	%

(1) Revenue from this customer is generated through our Domestic and Offshore segments.

(2) Revenue from this customer is generated through our Domestic and Offshore segments in 2014 and 2015 and through our Nearshore segment in 2014.