Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Cash
Cash, cash equivalents and marketable securities [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI, Cost	$ 142,768	$ 113,157
Debt Securities, Trading, and Equity Securities, FV-NI	142,768	113,157
Money market funds
Cash, cash equivalents and marketable securities [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI, Cost	731	23,621
Debt Securities, Trading, and Equity Securities, FV-NI	731	23,621
Bank Time Deposits
Cash, cash equivalents and marketable securities [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI, Cost	7,168	0
Debt Securities, Trading, and Equity Securities, FV-NI	7,168	0
Cash and Cash Equivalents
Cash, cash equivalents and marketable securities [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI, Cost	150,667	136,778
Debt Securities, Trading, and Equity Securities, FV-NI	150,667	136,778
Equity Securities
Cash, cash equivalents and marketable securities [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI, Cost	36,044	31,100
Debt Securities, Trading, and Equity Securities, FV-NI	$ 45,289	$ 33,014