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Leases - Schedule of Future Minimum Rental Payments (Details)
$ in Thousands
Sep. 30, 2019
USD ($)
Leases [Abstract]  
2019 (remaining three months) $ 58
2020 353
2021 59
Total 470
Less: imputed interest (47)
Total lease liability 423
Current operating lease liability 279
Noncurrent operating lease liability $ 144