Quarterly report pursuant to Section 13 or 15(d)

License Agreements and Clinical Research Support Agreements (Details)

v3.8.0.1
License Agreements and Clinical Research Support Agreements (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Research and development - licenses acquired $ 300 $ 0 $ 2,375 $ 0
IL13Ra2 [Member]        
Research and development - licenses acquired 0 0 250 0
IV/ICV [Member]        
Research and development - licenses acquired 0 0 125 0
PSCA [Member]        
Research and development - licenses acquired 0 0 300 0
HER2 [Member]        
Research and development - licenses acquired 0 0 600 0
CS1 [Member]        
Research and development - licenses acquired 0 0 600 0
UCLA [Member]        
Research and development - licenses acquired 0 0 200 0
Fred Hutch CD20 [Member]        
Research and development - licenses acquired $ 300 $ 0 $ 300 $ 0