Collaboration and license agreements - Summary of allocation of transaction price (Details) $ in Thousands	Jun. 30, 2024 USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	$ 19,064
Transaction Price Unsatisfied	16,613
Research and development targets
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	16,534
Transaction Price Unsatisfied	14,083
Option rights
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	2,530
Transaction Price Unsatisfied	$ 2,530