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Intangible Assets - Future Amortization (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Sep. 30, 2020
Future expected amortization of intangible assets    
2022 $ 1,330  
2023 1,187  
2024 649  
2025 287  
2026 0  
Thereafter 0  
Net Carrying Amount $ 3,453 $ 4,758