Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Additional Information (Details)

v3.22.2.2
Long-Term Debt - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Debt Disclosure [Abstract]      
Interest expense on long-term debt $ 0.1 $ 0.2 $ 0.2