Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies - Additional Information (Details)

v3.21.2
Significant Accounting Policies - Additional Information (Details)
$ in Thousands
 12 Months Ended
Sep. 30, 2021
USD ($)
state
reportable_unit
Sep. 30, 2020
USD ($)
reportable_unit
Summary Of Accounting Policies [Line Items]    
Weighted average cost inventory amount $ 46,100 $ 33,700
FIFO inventory amount 7,600 $ 4,800
Amount company is liable for per occurrence $ 500  
Number of reporting units | reportable_unit 1 5
Alabama, Florida, Georgia, North Carolina And South Carolina    
Summary Of Accounting Policies [Line Items]    
Number of states | state 4  
Minimum    
Summary Of Accounting Policies [Line Items]    
Amount company is liable for per occurrence $ 100  
Stop-loss insurance purchased 100  
Maximum    
Summary Of Accounting Policies [Line Items]    
Amount company is liable for per occurrence 500  
Stop-loss insurance purchased $ 160