Segment Information - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
General and administrative:
Stock-based compensation	$ 1,273	$ 1,223	$ 2,659	$ 2,497
Goodwill impairment charge	0	17,130	0	17,130	$ 17,100
Fair value adjustment for contingent consideration	532	2,220	2,456	4,765
Total operating expenses	10,427	28,192	25,285	39,410
Loss from operations	(10,427)	(28,192)	(25,285)	(39,410)
Net loss	(16,049)	(27,729)	(31,079)	(38,878)
Reportable Segment
Research and development:
Personnel	1,294	757	2,614	1,544
Stock-based compensation	438	81	873	187
Clinical and contract manufacturing	5,342	3,718	12,069	7,040
Other	(521)	(409)	(858)	(922)
General and administrative:
Personnel	1,038	1,568	2,765	2,995
Stock-based compensation	834	1,142	1,785	2,310
Consulting and professional costs	786	1,015	2,252	2,613
Other	684	970	1,329	1,748
Goodwill impairment charge	0	17,130	0	17,130
Fair value adjustment for contingent consideration	532	2,220	2,456	4,765
Total operating expenses	10,427	28,192	25,285	39,410
Loss from operations	(10,427)	(28,192)	(25,285)	(39,410)
Other segment items	(5,622)	463	(5,794)	532
Net loss	$ (16,049)	$ (27,729)	$ (31,079)	$ (38,878)