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New Accounting Pronouncements (Details) - COVID-19
$ in Millions
12 Months Ended
Sep. 30, 2021
USD ($)
lease_concesion
New Accounting Pronouncement, Early Adoption [Line Items]  
Number of operating lease concessions | lease_concesion 1
Decrease in operating lease liabilities due to lease concessions $ 0.1
Decrease in operating right-of-use assets due to lease concessions $ 0.1