Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Collaboration and License Agreements - Summary of Reconciliation of Deferred Costs Related To Collaboration Agreement (Detail) - Collaboration Agreement [Member]
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]  
Balance at December 31, 2018 $ 310
Costs recognized (77)
Balance at March 31, 2019 $ 233