Segment Information (Tables)

3 Months Ended

Mar. 31, 2025

Segment Reporting [Abstract]

Schedule of Significant Segment Expense Categories

In addition, the CODM is regularly provided the following significant segment expense categories which are reviewed against budgeted expectations to assist in resource allocation decision-making:

	Three Months Ended March 31,
(In thousands)	2025			2024
HSCT-TMA (AK901) clinical program expense	$	(62	)	$	(633	)
ADC preclinical development		(17	)		—
Chemistry, manufacturing and control		(28	)		(711	)
Other external development expense		(98	)		(305	)
Internal and other research and development expense		(417	)		(587	)
General and administrative expense		(1,888	)		(3,457	)
Stock-based compensation expense		(1,015	)		(296	)
Other segment items (1)		(180	)		423
Net loss	$	(3,705	)	$	(5,566	)

(1) Other segment items include interest income, interest expense, gain on debt extinguishment, change in fair value of warrant liabilities, net foreign currency exchange gains (losses) and other expense, net as reported in the Company’s condensed consolidated statements of operations and comprehensive loss.