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Long-term Debt - Schedule of Maturities of Future Principal Obligations (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Debt Disclosure [Abstract]    
Remainder of 2020 $ 76  
2021 825  
2022 1,604  
2023 1,291  
2024 1,304  
Thereafter 439  
Total debt $ 5,539 $ 0