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Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Sep. 30, 2023
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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

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