Collaboration and license agreements - Schedule of financial information related to collaboration and license agreements (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Accounts Receivable	$ 1,028	$ 1,473
Deferred revenue, current	13,971	16,618
Deferred revenue, net of current	24,647	16,895
Deferred revenue, total	38,618	33,513
Roche Agreement
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Accounts Receivable	500	417
Deferred revenue, current	5,718	4,649
Deferred revenue, net of current	16,314	16,895
Deferred revenue, total	22,032	21,544
Biogen Agreement
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Accounts Receivable	0	0
Deferred revenue, current	6,586	11,427
Deferred revenue, net of current	0	0
Deferred revenue, total	6,586	11,427
Calico Agreement
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Accounts Receivable	528	1,056
Deferred revenue, current	0	542
Deferred revenue, net of current	0	0
Deferred revenue, total	0	$ 542
Betta Agreements
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Accounts Receivable	0
Deferred revenue, current	1,667
Deferred revenue, net of current	8,333
Deferred revenue, total	$ 10,000