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Accounting Policies (Tables)
12 Months Ended
Sep. 30, 2024
Accounting Policies [Abstract]  
Property, Plant and Equipment Depreciation generally is recorded using the straight-line method over the estimated useful life of the asset as follows:
Estimated Useful LivesSeptember 30,
 20242023
  (In millions)
Leasehold improvements
5 to 10 years
$1.8 $1.6 
Property and equipment
2 to 10 years
9.1 7.0 
Total property and equipment10.9 8.6 
Accumulated depreciation(3.8)(2.7)
Property and equipment, net$7.1 $5.9 

Depreciation expense was $1.1 million, $1.0 million and $0.7 million in fiscal 2024, 2023 and 2022, respectively.