Segment and Geographic Information - Net Revenues Based upon Source of Order by Geographic Area - Tabular Disclosure (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 132,735	$ 129,087	$ 417,931	$ 376,764
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	88,557	83,638	285,283	236,939
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	25,042	27,009	75,863	82,412
CHINA
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	12,906	11,077	33,936	33,869
Asia / Pacific/ Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 6,230	$ 7,363	$ 22,849	$ 23,544