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Geographic Information and Concentrations of Risk (Tables)
3 Months Ended
Mar. 31, 2017
Segment Reporting [Abstract]  
Schedule of Geographic Concentration of Net Revenues
 
Three Months Ended
March 31,
 
2017
 
2016
United States and Canada
71.1
%
 
76.8
%
South Africa
17.7

 
13.6

Other
11.2

 
9.6

 
100.0
%
 
100.0
%