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Commitment and Contingencies - Future Minimum Operating Lease Payments Under ASC 840 (Details)
$ in Thousands
Sep. 30, 2019
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2020 $ 1,641
2021 2,157
2022 1,777
2023 1,550
2024 1,151
2025 36
Thereafter 0
Total minimum lease payments $ 8,312