Commitments and Contingencies - Additional details of office space lease (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Commitments and Contingencies
Operating lease - right-of-use asset	$ 1,195	$ 1,084
Operating lease liability, current	390	240
Operating lease liability, net of current portion	868	919
Total	$ 1,258	$ 1,159
Weighted-average remaining life (years)	2 years 3 months 7 days	3 years 2 months 15 days
Weighted-average discount rate	18.46%	21.10%