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Leases - Summary of Future Minimum Payments for Operating and Finance Leases and Reconciliation of Undiscounted Cash Flows (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Lease payments due for each of the years ending December 31,
2021	$ 513
2022	2,061
2023	1,815
2024	1,760
2025	1,373
Thereafter	4,810
Total undiscounted cash flows	12,332
Discount on cash flows	(1,382)
Total lease liability	10,950	$ 11,200
Lease payments due for each of the years ending December 31,
2021	54
2022	217
2023	217
2024	252
2025	259
Thereafter	3,733
Total undiscounted cash flows	4,732
Discount on cash flows	(1,330)
Total lease liability	$ 3,402	$ 3,467

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