Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Disaggregation of Revenue
Weighted average remaining lease term (in years)	2 years 3 months 29 days
Rent expense under non-cancelable operating leases	$ 200	$ 200
Weighted average discount rate (as a percent)	7.89%
Lease payments	$ 200	$ 200
BARDA | Refundable Agreements
Disaggregation of Revenue
Provision for refundable amounts	$ 52		$ 52