Revenue recognition - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Liability, revenue recognized	$ 14,225	$ 16,224	$ 18,028
License | Zai License and Collaboration Agreement
Disaggregation of Revenue [Line Items]
Revenue recognition, milestone payments				$ 10,000