XML 115 R98.htm IDEA: XBRL DOCUMENT v3.21.2
Earnings Per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
Earnings Per Share [Abstract]      
Stock options 121,274 581,634 506,207