Research and Collaboration Arrangements - Roche Agreement - Additional Information (Details 1) - Roche - 2017 Roche Agreement - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-04-01	Mar. 31, 2021
Minimum
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Deferred revenue, estimated performance period	3 years
Maximum
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Deferred revenue, estimated performance period	4 years