Quarterly report pursuant to Section 13 or 15(d)

Research and Development Agreements - Schedule of Contract Assets and Contract Liabilities for Performance Obligations related to Collaboration Agreements (Detail)

v3.10.0.1
Research and Development Agreements - Schedule of Contract Assets and Contract Liabilities for Performance Obligations related to Collaboration Agreements (Detail) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Contract Liabilities    
Deferred revenue $ 33,400 $ 2,765
ASC 2014-09    
Contract Assets    
Unbilled revenue 0 0
Contract Liabilities    
Deferred revenue $ 33,023 $ 1,092