Annual report pursuant to Section 13 and 15(d)

Collaboration and License Agreements - Summary of Reconciliation of Deferred Costs Related To Collaboration Agreement (Detail)

v3.20.1
Collaboration and License Agreements - Summary of Reconciliation of Deferred Costs 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 $ 310 $ 0
Cumulative effect of adoption of accounting standard   687
Costs recognized (310) (377)
Balance $ 0 $ 310