Operating Lease - Schedule of Future Minimum Payments Under Non-cancellable Operating Leases (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Leases [Abstract]
2019 (6 months)	$ 552
2020	1,123
2021	1,173
2022	1,208
2023	1,244
Thereafter	2,151
Total future minimum lease payments	7,451
Less imputed interest	1,547
Total operating lease liability	5,904
Less current operating lease liability	678
Non-current operating lease liability	$ 5,226