Segment and Geographic Information - Net Revenues Based upon Source of Order by Geographic Area - Tabular Disclosure (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 178,366	$ 139,652
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	88,935	90,083
Rest of Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	39,422	19,700
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	5,413	8,312
Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	17,210	548
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	13,408	13,041
Asia / Pacific / Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 13,978	$ 7,968