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Commitments and Contingencies - Additional Information (Detail) - USD ($)
12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Loss Contingencies [Line Items]      
Costs incurred for store closings and lease terminations $ 0 $ 0 $ 1,700,000
Asset Pledged as Collateral without Right [Member] | Letter of Credit [Member]      
Loss Contingencies [Line Items]      
Workers compensation insurance policies $ 2,000,000.0