Business Information - Long-lived Assets by Geographic Areas (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 58,487	$ 63,095
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	51,801	54,109
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 6,686	$ 8,986