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Commitments and Contingencies - Schedule of Future Minimum Lease Payments Under Non-Cancelable Operating Leases (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Leases [Abstract]  
2019 $ 2,944
2020 3,035
2021 3,123
2022 3,216
2023 1,690
Thereafter 1,741
Total $ 15,749