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Segment Information (Tables)
9 Months Ended
Sep. 30, 2012
Segment Information [Abstract]  
Revenues by geographic region
 
   
Three months ended
September 30, 2012
   
Three months ended
September 30, 2011
 
   
Amount
   
Percentage
   
Amount
   
Percentage
 
Net revenues made in the U.S.
 
$
877
     
52
%
 
$
741
     
58
%
                                 
Net revenues made outside of the U.S.
   
802
     
48
%
   
546
     
42
%
                                 
   
$
1,679
     
100
%
 
$
1,287
     
100
%
 
   
Nine months ended
September 30, 2012
   
Nine months ended
September 30,
2011
 
   
Amount
   
Percentage
   
Amount
   
Percentage
 
Net revenues made in the U.S.
 
$
2,809
     
58
%
 
$
955
     
45
%
                                 
Net revenues made outside of the U.S.
   
2,008
     
42
%
   
1,154
     
55
%
                                 
   
$
4,817
     
100
%
 
$
2,109
     
100
%