Significant segment expenses - Schedule of significant segment expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
General and administrative
Total general and administrative	$ 7,256	$ 6,728
Single reportable segment
Research and development
Clinical trials	14,441	5,100
Employee compensation and benefits	1,606	461
Consulting	288	483
Other	288	676
Total research and development	21,553	9,158
General and administrative
Legal and professional fees	2,864	3,007
Consulting	1,533	1,961
Employee compensation and benefits	1,659	620
Other	1,200	1,140
Total general and administrative	7,256	6,728
Total operating expenses	28,809	15,886
Single reportable segment | Related party
Research and development
Costs under the Shared Services Agreement with Dong-A (related party)	$ 4,930	$ 2,438