Quarterly report pursuant to Section 13 or 15(d)

Revenue - Revenue From Licensing Agreements and Strategic Partnerships (Details)

v3.8.0.1
Revenue - Revenue From Licensing Agreements and Strategic Partnerships (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Disaggregation of Revenue [Line Items]    
Revenue $ 4,152 $ 1,343
Seattle Genetics    
Disaggregation of Revenue [Line Items]    
Revenue 308 0
AstraZeneca    
Disaggregation of Revenue [Line Items]    
Revenue 2,545 0
Servier    
Disaggregation of Revenue [Line Items]    
Revenue 1,208 326
Other    
Disaggregation of Revenue [Line Items]    
Revenue $ 91 $ 1,017