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Intangible Assets - Estimated Future Amortization Expense of Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Intangible Assets    
2020 (Remainder) $ 464  
2021 1,858  
2022 1,858  
2023 1,851  
2024 1,587  
Thereafter 10,876  
Total intangible assets, net $ 18,494 $ 14,009