Deferred Revenue - Additional Information (Details1) - Genentech, Inc. - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01	Dec. 31, 2019
Minimum
Disaggregation Of Revenue [Line Items]
Deferred revenue, expected to be recognized	12 months
Maximum
Disaggregation Of Revenue [Line Items]
Deferred revenue, expected to be recognized	8 years