Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Marketable securities
Cash, cash equivalents and marketable securities [Line Items]
Amortized Cost	$ 25,956	$ 23,836
Debt Securities, Trading, and Equity Securities, FV-NI	24,515	31,884
Cash and Cash Equivalents
Cash, cash equivalents and marketable securities [Line Items]
Amortized Cost	133,202	195,354
Debt Securities, Trading, and Equity Securities, FV-NI	133,202	195,354
Cash and Cash Equivalents | Cash
Cash, cash equivalents and marketable securities [Line Items]
Amortized Cost	113,888	195,160
Debt Securities, Trading, and Equity Securities, FV-NI	113,888	195,160
Cash and Cash Equivalents | Money market funds
Cash, cash equivalents and marketable securities [Line Items]
Amortized Cost	19,314	194
Debt Securities, Trading, and Equity Securities, FV-NI	$ 19,314	$ 194