Quarterly report pursuant to Section 13 or 15(d)

Collaboration and License Agreements - Summary of Deferred Costs Expected To Recognize Related to Execution of Collaboration Agreement (Detail)

v3.19.1
Collaboration and License Agreements - Summary of Deferred Costs Expected To Recognize Related to Execution of Collaboration Agreement (Detail) - Collaboration Agreement [Member] - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]    
Within 1 year $ (195)  
1-2 years (38)  
Total deferred costs $ 233 $ 310