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Segment Information (Tables)
9 Months Ended
Sep. 30, 2012
Segment Reporting [Abstract]  
Schedule of Revenue by Geographic Area
Geographic information is as follows (in thousands):
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2012
 
2011
 
2012
 
2011
Revenue:
 

 
 

 
 
 
 
United States
$
2,723

 
$
3,762

 
$
9,030

 
$
10,604

Canada
1,408

 
1,066

 
3,859

 
3,172

Other countries
29

 
145

 
390

 
198

Total revenue
$
4,160

 
$
4,973

 
$
13,279

 
$
13,974