Segment Reporting - Schedule of Segment Reporting Information by Segment (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2026	Mar. 31, 2025
Segment Reporting Information [Line Items]
Personnel-related costs (excluding stock-based compensation)		$ 2,691	$ 4,549
Other G&A Expenses		2,029	2,706
Interest income, net		(192)	(371)
Other segment items	[1]	1,768	771
Total segment net loss		7,609	11,031
Bempikibart [Member]
Segment Reporting Information [Line Items]
Other Research And Development Expense		1,310	2,764
ADX-097 Member]
Segment Reporting Information [Line Items]
Other Research And Development Expense		0	569
Discovery and other [Member]
Segment Reporting Information [Line Items]
Other Research And Development Expense		$ 3	$ 43

[1] Other segment items are included in order to reconcile to total segment net loss. Other segment items include non-cash items such as depreciation and amortization expense, stock-based compensation expense and the change in fair value of contingent value rights.