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Leases - Maturities of Operating Lease Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Sep. 30, 2020
Leases [Abstract]    
Remainder of 2021 $ 1,859  
2022 2,302  
2023 1,233  
2024 86  
2025 0  
Thereafter 0  
Total future minimum lease payments 5,480  
Less: present value discount (imputed interest) (251)  
Present value of lease liabilities $ 5,229 $ 5,786