Segment Reporting - Schedule of Revenue from External Customers by Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Revenues from External Customers and Long-Lived Assets [Line Items]
Total segment and consolidated revenue	$ (29)	$ 3,032
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Total segment and consolidated revenue	12	1,238
Foreign | GSK
Revenues from External Customers and Long-Lived Assets [Line Items]
Total segment and consolidated revenue	(41)	(70)
Foreign | Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Total segment and consolidated revenue	$ 0	$ 1,864