Collaboration, license and option agreements - Additional Information (Details) - USD ($) $ in Thousands		12 Months Ended			36 Months Ended
	Nov. 18, 2021	Dec. 31, 2023	Dec. 31, 2021	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2022
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Collaboration Amendment Date				2019-04
Retained Earnings (Accumulated Deficit)		$ (416,263)				$ (292,801)
Liability to licensor		19,806				19,806
BeiGene
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Collaboration Amendment Date			2021-11
Upfront Non-Refundable Payment					$ 25,000
Revenues		0
License termination information, Description	In the event the license is terminated, the liability will be extinguished with no further payment to BeiGene.
Current portion of deferred revenue	$ 19,800
Liability to licensor		$ 19,800				$ 19,800