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Summary of Significant Accounting Policies - Future Minimum Lease Payments from Capital Leases (Details)
$ in Thousands
Sep. 30, 2021
USD ($)
Accounting Policies [Abstract]  
October 1 to December 31, 2021 $ 168
2022 588
2023 167
2024 71
2025 29
Thereafter 50
Total minimum lease payments 1,073
Less: Amount representing interest (75)
Present value of minimum lease payments $ 998