Segment and Geographic Information - Long-Lived Assets, Consisting of Property, Plant and Equipment by Geographic Area (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 154,470	$ 130,719
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	84,852	55,943
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	84,800	60,600
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	56,585	54,239
Asia / Pacific / Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	1,423	3,655
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 11,610	$ 16,882