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Geographic Information
9 Months Ended
Sep. 30, 2011
Geographic Information [Abstract] 
Geographic Information
17. Geographic Information
The Company operates in one reportable segment, M2M data communications. Other than satellites in orbit, long-lived assets outside of the United States are not significant. The following table summarizes revenues on a percentage basis by geographic regions, based on the country in which the customer is located.
                                 
    Three months ended     Nine months ended  
    September 30,     September 30,  
    2011     2010     2011     2010  
United States
    84 %     85 %     84 %     82 %
Japan
    15 %     12 %     15 %     14 %
Other
    1 %     3 %     1 %     4 %
 
                       
 
    100 %     100 %     100 %     100 %