Geographic, product and industry information - Geographic Region (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Revenue	$ 48,127	$ 31,204	$ 90,145	$ 59,364
Americas
Segment Reporting Information [Line Items]
Revenue	28,458	18,561	51,839	35,896
EMEA
Segment Reporting Information [Line Items]
Revenue	15,204	9,978	29,725	19,036
APAC
Segment Reporting Information [Line Items]
Revenue	$ 4,465	$ 2,665	$ 8,581	$ 4,432