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Commitments and Contingent Liabilities - Projected Minimum Rentals (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Non-Cancelable Operating Leases    
2023 $ 1,921  
2024 1,948  
2025 1,951  
2026 1,775  
2027 1,361  
Thereafter 3,532  
Total 12,488  
Leases    
Rent expense $ 1,900 $ 1,700