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Intangible Assets - Amortization (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Sep. 30, 2020
Future expected amortization of intangible assets    
Remainder of 2021 $ 668  
2022 1,330  
2023 1,186  
2024 647  
2025 279  
Total $ 4,110 $ 4,758