Operating Lease - Schedule of Future Minimum Payments Under Non-cancellable Operating Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Leases [Abstract]
2020 (6 months)	$ 571
2021	1,173
2022	1,208
2023	1,244
2024	1,280
Thereafter	871
Total future minimum lease payments	6,347
Less imputed interest	1,121
Total operating lease liability	5,226
Less operating lease liability, current	782
Operating lease liability, non-current	$ 4,444	$ 4,849