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Geographic, product and industry information - Geographic Region (Detail) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
Segment Reporting Information [Line Items]      
Revenue $ 132,333 $ 90,100 $ 54,385
Americas      
Segment Reporting Information [Line Items]      
Revenue 77,909 59,164 36,932
EMEA      
Segment Reporting Information [Line Items]      
Revenue 44,124 25,821 14,692
APAC      
Segment Reporting Information [Line Items]      
Revenue $ 10,300 $ 5,115 $ 2,761