Quarterly report pursuant to Section 13 or 15(d)

Restricted Investments - Summary of Debt Securities (Details)

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Restricted Investments - Summary of Debt Securities (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Sep. 30, 2023
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost $ 17,511 $ 15,926
Gross Unrealized Gains 0 0
Gross Unrealized Losses 495 847
Fair Value 17,016 15,079
U.S. government securities    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 7,564 6,869
Gross Unrealized Gains 0 0
Gross Unrealized Losses 213 320
Fair Value 7,351 6,549
Corporate debt securities    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 6,930 5,931
Gross Unrealized Gains 0 0
Gross Unrealized Losses 141 326
Fair Value 6,789 5,605
Municipal government securities    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 1,760 1,853
Gross Unrealized Gains 0 0
Gross Unrealized Losses 65 105
Fair Value 1,695 1,748
Agency backed securities    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 1,257 1,273
Gross Unrealized Gains 0 0
Gross Unrealized Losses 76 96
Fair Value $ 1,181 $ 1,177