Collaboration and license agreements - Summary of allocation of transaction price (Details) $ in Thousands	Mar. 31, 2023 USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	$ 67,822
Transaction Price Unsatisfied	27,691
Research and development targets
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	61,074
Transaction Price Unsatisfied	25,189
Option rights
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	6,748
Transaction Price Unsatisfied	$ 2,502