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Supplemental Disclosure for Net Income Per Share - Additional Information (Details) - shares
3 Months Ended 6 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Restricted Stock        
Supplemental Disclosure for Net Income Per Share        
Antidilutive restricted stock awards 0 0    
Stock options        
Supplemental Disclosure for Net Income Per Share        
Antidilutive restricted stock awards 273,489 137,250 269,889 137,250