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Segment and Geographical Information (Tables)
 3 Months Ended
Mar. 31, 2017
Segment Reporting [Abstract]  
Summary of Revenue by Geographical Region
 Mobility Services
Three Months Ended March 31,
 
2017

2016
United States
43
%

42
%
Europe, Middle East and Africa
47
%

45
%
Asia Pacific
8
%

12
%
Rest of the World
2
%

1
%