Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies - Additional Information (Details)

v3.22.2.2
Significant Accounting Policies - Additional Information (Details)
 12 Months Ended
Sep. 30, 2022
USD ($)
reportable_unit
component
state
Sep. 30, 2021
USD ($)
Oct. 01, 2021
USD ($)
Summary Of Accounting Policies [Line Items]      
Restricted cash $ 28,261 $ 0  
Restricted investments 6,866,000 0  
Debt securities, available-for-sale, allowance for credit loss 0 0  
Debt securities, available-for-sale, intent impairments 0 0  
Weighted average cost inventory amount 64,800,000 46,200,000  
FIFO inventory amount $ 9,400,000 7,600,000  
Amount retained for each claim paid     $ 1,000,000
Amount retained by CIRCA per claim paid     $ 550,000
Amount company is liable for per occurrence   1,000,000  
Number of reporting units | reportable_unit 1    
Alabama, Florida, Georgia, North Carolina and South Carolina      
Summary Of Accounting Policies [Line Items]      
Number of states | state 5    
Number of platform operating companies | component 5    
Minimum      
Summary Of Accounting Policies [Line Items]      
Amount company is liable for per occurrence   100,000  
Stop-loss insurance purchased $ 100,000    
Maximum      
Summary Of Accounting Policies [Line Items]      
Amount company is liable for per occurrence   $ 500,000  
Stop-loss insurance purchased $ 160,000