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)

v3.8.0.1
Research and Development Agreements - Schedule of Contract Assets and Contract Liabilities for Performance Obligations related to Collaboration Agreements (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Contract Liabilities    
Deferred revenue $ 6,350 $ 2,765
ASC 2014-09    
Contract Assets    
Unbilled revenue 54 0
Contract Liabilities    
Deferred revenue $ 4,929 $ 1,092