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Leases - Future Lease Payments Under Operating Lease for Topic 842 (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Leases [Abstract]  
2020 $ 800
2021 800
2022 800
2023 800
2024 800
Thereafter 1,600
Total undiscounted cash flows 5,600
Present value discount (755)
Lease liability as of December 31, 2019 $ 4,845