Collaboration and license agreements - Allocation of total transaction price and unsatisfied transaction price (Details) $ in Thousands	Dec. 31, 2025 USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	$ 23,231
Transaction Price Unsatisfied	10,446
Research and development targets
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	20,834
Transaction Price Unsatisfied	8,049
Option rights
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	2,397
Transaction Price Unsatisfied	$ 2,397