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Summary of Significant Accounting Policies - Summary of Estimated Amortization Expense (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Finite Lived Intangible Assets Future Amortization Expense [Abstract]  
2019 $ 801
2020 501
2021 458
2022 458
2023 458
Thereafter 3,260
Net Carrying Amount $ 5,936