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Supporting Financial Information - Equipment and Improvements, Net (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Furniture and equipment $ 1,177 $ 1,832
Computer equipment and software 4,190 7,273
Leasehold improvements 1,567 1,614
Total equipment and improvements 6,934 10,719
Less: accumulated depreciation (5,502) (8,889)
Equipment and improvements, net $ 1,432 $ 1,830