Commitments and Contingencies - Additional details of office space lease (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Commitments and Contingencies
Operating lease - right-of-use asset	$ 1,176	$ 1,140
Operating lease liability, current	348	483
Operating lease liability, net of current portion	886	725
Total operating lease liability	$ 1,234	$ 1,208
Weighted-average remaining life (years)	1 year 8 months 15 days	2 years 4 months 9 days
Weighted-average discount rate	16.82%	17.89%