XML 77 R57.htm IDEA: XBRL DOCUMENT v3.23.3
Summary of Operations and Significant Accounting Policies - Advertising Expense - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Advertising expense $ 0.6 $ 0.4 $ 0.2