Annual report pursuant to Section 13 and 15(d)

Collaboration and License Agreements - Summary of Reconciliation of Deferred Revenue Related to Collaboration Agreement (Detail)

v3.20.1
Collaboration and License Agreements - Summary of Reconciliation of Deferred Revenue Related to Collaboration Agreement (Detail) - Collaboration Agreement [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]    
Balance $ 12,890 $ 26,691
Cumulative effect of adoption of accounting standard   1,299
Additions to deferred revenue 8,826 18,486
Revenue recognized (21,716) (33,586)
Balance $ 0 $ 12,890