Commitments and Contingencies - Schedule of Lease Cost and Other Information of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Lease cost:
Operating lease cost	$ 118	$ 122
Short-term lease cost	13	0
Sublease income	(13)	(13)
Total lease cost	118	109
Other information
Cash paid for amounts included in the measurement of lease liabilities	140	141
Operating cash flows from operating leases	$ (18)	$ (14)
Weighted-average remaining lease term - operating leases	9 months 18 days	1 year 8 months 12 days
Weighted-average discount rate - operating leases	10.10%	10.10%