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PRINCIPAL CLIENTS (Tables)
 9 Months Ended
Sep. 30, 2017
Risks and Uncertainties [Abstract]  
Schedule of Revenue by Major Customers
The following table represents revenue concentration of our principal clients:
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
 
2017
 
2016
 
2017
 
2016
 
 
Revenue
 
Percentage
 
Revenue
 
Percentage
 
Revenue
 
Percentage
 
Revenue
 
Percentage
T-Mobile
 
$
21,937

 
31.6
%
 
$
20,298

 
25.9
%
 
$
67,990

 
30.8
%
 
$
53,359

 
23.2
%
Sprint
 
$
6,773

 
9.8
%
 
$
11,656

 
14.9
%
 
$
26,544

 
12.0
%
 
$
33,785

 
14.7
%
AT&T
 
$
7,095

 
10.2
%
 
$
9,194

 
11.7
%
 
$
23,362

 
10.6
%
 
$
29,416

 
12.8
%