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Supporting Financial Information - Equipment and Improvements, net (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Furniture and equipment $ 893 $ 958
Computer equipment 2,316 1,262
Computer software 4,407 4,353
Leasehold improvements 1,614 1,595
Total equipment and improvements 9,230 8,168
Less: accumulated depreciation and amortization (7,526) (6,256)
Equipment and improvements, net 1,704 1,912
Depreciation $ 1,100 $ 1,500