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Goodwill and Intangible Assets - Schedule of Estimated Future Amortization Expense (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]    
2020—remaining $ 3,121  
2021 6,020  
2022 5,633  
2023 3,696  
2024 1,741  
2025 1,124  
Net $ 21,335 $ 24,405