Collaboration and license agreements - Summary of allocation of transaction price (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	$ 67,822
Transaction Price Unsatisfied	29,310
Research and development targets
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	61,074
Transaction Price Unsatisfied	26,808
Option rights
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Transaction Price Allocated	6,748
Transaction Price Unsatisfied	$ 2,502