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
Dec. 31, 2023
Sep. 30, 2023
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost $ 14,927 $ 15,926
Gross Unrealized Gains 0 0
Gross Unrealized Losses 342 847
Fair Value 14,585 15,079
U.S. government securities    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 6,072 6,869
Gross Unrealized Gains 0 0
Gross Unrealized Losses 111 320
Fair Value 5,961 6,549
Corporate debt securities    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 5,829 5,931
Gross Unrealized Gains 0 0
Gross Unrealized Losses 108 326
Fair Value 5,721 5,605
Municipal government securities    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 1,757 1,853
Gross Unrealized Gains 0 0
Gross Unrealized Losses 62 105
Fair Value 1,695 1,748
Agency backed securities    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 1,269  
Gross Unrealized Gains 0  
Gross Unrealized Losses 61  
Fair Value $ 1,208  
Other debt securities    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost   1,273
Gross Unrealized Gains   0
Gross Unrealized Losses   96
Fair Value   $ 1,177