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Cash, Cash Equivalents and Marketable Securities
 12 Months Ended
Sep. 30, 2024
Cash and Cash Equivalents [Abstract]  
Cash, Cash Equivalents and Marketable Securities Cash, Cash Equivalents and Marketable Securities
The following is a summary of cash, cash equivalents and marketable securities at September 30, 2024 and 2023: 
 September 30, 2024September 30, 2023
 Amortized
Cost		Fair ValueAmortized
Cost		Fair Value
 (In thousands)
Cash and Cash Equivalents:
     Cash$142,768 $142,768 $113,157 $113,157 
     Money market funds731 731 23,621 23,621 
     Bank time deposits7,168 7,168 — — 
        Total$150,667 $150,667 $136,778 $136,778 
Marketable Securities:
     Marketable securities$36,044 $45,289 $31,100 $33,014 
The assets included in marketable securities represent long-term marketable equity securities held under a supplemental retirement and savings plan for certain officers and senior management employees, which are distributed upon termination or retirement of the employees. These investments are treated as trading securities and recorded at fair value.