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Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Sep. 30, 2022
--- | --- | ---
Marketable securities |  |
Cash, cash equivalents and marketable securities [Line Items] |  |
Amortized Cost | $ 31,100 | $ 25,956
Debt Securities, Trading, and Equity Securities, FV-NI | 33,014 | 24,515
Cash and Cash Equivalents |  |
Cash, cash equivalents and marketable securities [Line Items] |  |
Amortized Cost | 136,778 | 133,202
Debt Securities, Trading, and Equity Securities, FV-NI | 136,778 | 133,202
Cash and Cash Equivalents | Cash |  |
Cash, cash equivalents and marketable securities [Line Items] |  |
Amortized Cost | 113,157 | 113,888
Debt Securities, Trading, and Equity Securities, FV-NI | 113,157 | 113,888
Cash and Cash Equivalents | Money market funds |  |
Cash, cash equivalents and marketable securities [Line Items] |  |
Amortized Cost | 23,621 | 19,314
Debt Securities, Trading, and Equity Securities, FV-NI | $ 23,621 | $ 19,314

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