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Summary of Significant Accounting Policies - Schedule of Amortization Expense (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Amortization Expense    
2020 $ 225  
2021 225  
2022 215  
2023 215  
2024 215  
Thereafter 1,508  
Intangible assets subject to amortization, net $ 2,603 $ 2,984