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Geographical Information (Tables)
 3 Months Ended
Dec. 31, 2018
Segment Reporting [Abstract]  
Schedule of Revenue by Geographic Region
The following tables set forth revenue by geographic region with revenue assigned to geographic regions based on our customers’ billing address.

Revenue by Geographic Region
 
For the three months ended December 31,
(in thousands)
 
2018
 
2017
United States and Canada
 
$
18,576

 
$
20,079

Asia
 
4,045

 
2,657

Europe
 
1,266

 
1,227

Other
 
114

 
73

Total revenue
 
$
24,001

 
$
24,036