Segment Information - Summary of Segment Reporting Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Revenues	$ 10	$ 5
Less segment expenses:
Research and development	362	16,279
General and administrative	4,460	12,219
Gain on lease modification	0	(298)
Restructuring costs	0	1,269
Property and equipment and right-of-use asset impairment	0	4,803
Total operating expenses	4,822	34,272
Interest expense	0	(1,921)
Other income , net	133	1,048
Net loss	(4,679)	(35,140)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	10	5
Less segment expenses:
Research and development	340	16,279
General and administrative	4,436	12,219
Gain on lease modification	0	(298)
Restructuring costs	0	1,269
Property and equipment and right-of-use asset impairment	0	4,803
Total operating expenses	4,776	34,272
Interest expense	0	(1,921)
Other income , net	133	1,048
Net loss	$ (4,633)	$ (35,140)