PRINCIPAL CLIENTS (Tables)

12 Months Ended

Dec. 31, 2016

Risks and Uncertainties [Abstract]

Schedule of Revenue by Major Client

The following table represents revenue concentration of our principal clients:

	Year Ended December 31,
	2016				2015				2014
	Revenue		Percentage		Revenue		Percentage		Revenue		Percentage
T-Mobile	$	74,686	24.3	%	$	69,427	24.6	%	$	76,675	30.7	%
Sprint	$	45,137	14.7	%	$	25,422	9.0	%	$	—	—	%
AT&T	$	38,257	12.5	%	$	35,019	12.4	%	$	55,265	22.1	%
Comcast	$	25,323	8.2	%	$	31,976	11.3	%	$	40,868	16.3	%