Segments and Information about Revenues by Geographic Region
 9 Months Ended
Sep. 30, 2013
Segment Reporting [Abstract]  
Segments and Information about Revenues by Geographic Area
Segments and Information about Revenues by Geographic Area
The following table presents our revenues by geographic region of end users who purchased products or services for the periods presented below:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2013
 
2012
 
2013
 
2012
 
(in thousands)
United States and Canada
$
49,887

 
$
27,086

 
$
122,905

 
$
72,338

International
11,192

 
5,040

 
28,076

 
13,589

Total revenues
$
61,079

 
$
32,126

 
$
150,981

 
$
85,927


    
Substantially all of our long-lived assets are located in the United States as of September 30, 2013 and December 31, 2012.