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Leases - Summary of Estimated Minimum Lease Payments (Details)
$ in Thousands
Mar. 31, 2019
USD ($)
Leases [Abstract]  
2019 (remaining 9 months) $ 545
2020 450
2021 209
2022 136
2023 96
Thereafter 40
Total lease payments 1,476
Less: Present value adjustment using incremental borrowing rate 141
Present value of operating lease liabilities $ 1,335