Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue
Weighted average remaining lease term (in years)	2 years 6 months 29 days
Lease expense under operating leases	$ 0.7	$ 0.7	$ 0.7
Weighted average discount rate (as a percent)	7.89%
Lease payments	$ 0.7	0.6
BARDA | Refundable Agreements
Disaggregation of Revenue
Provision for refundable amounts	$ 0.1	$ 0.1