Collaboration agreement with AbbVie - Change in deferred revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Deferral of revenue	$ (6,941)	$ (9,041)
Recognition of revenue	(6,941)	(9,041)
Collaboration agreement with AbbVie
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Beginning balance	6,941	15,982
Recognition of revenue	(6,941)	(9,041)
Balance at the end of the period	$ 0	$ 6,941