Collaboration and license agreements - Summary of allocation of transaction price (Details) $ in Thousands	Mar. 31, 2024 USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	$ 19,064
Transaction Price Unsatisfied	17,576
Research and development targets
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	16,688
Transaction Price Unsatisfied	15,200
Option rights
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	2,376
Transaction Price Unsatisfied	$ 2,376