Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Total Revenue	$ 84,257	$ 73,146
North America, primarily the United States
Disaggregation of Revenue [Line Items]
Total Revenue	66,243	54,018
Europe, Middle East & Africa
Disaggregation of Revenue [Line Items]
Total Revenue	10,159	10,536
Rest of world
Disaggregation of Revenue [Line Items]
Total Revenue	7,855	8,592
Transferred at a point in time
Disaggregation of Revenue [Line Items]
Total Revenue	66,535	64,188
Transferred over time
Disaggregation of Revenue [Line Items]
Total Revenue	$ 17,722	$ 8,958