Collaboration and license agreements - Summary of allocation of transaction price (Details) $ in Thousands	Mar. 31, 2026 USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	$ 23,481
Transaction Price Unsatisfied	8,311
Research and development targets
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	21,053
Transaction Price Unsatisfied	5,883
Option rights
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	2,428
Transaction Price Unsatisfied	$ 2,428