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Geographical Information (Tables)
 9 Months Ended
Jun. 30, 2017
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 June 30,
 
For the nine months ended June 30,
(in thousands)
2017
 
2016
 
2017
 
2016
United States
$
23,391

 
$
17,469

 
$
74,075

 
$
46,651

Asia
5,699

 
3,100

 
14,190

 
14,077

Europe
1,653

 
1,680

 
4,978

 
5,214

Other
209

 
127

 
476

 
456

Total revenue
$
30,952

 
$
22,376

 
$
93,719

 
$
66,398