Annual report pursuant to Section 13 and 15(d)

License, Clinical Trial and Sponsored Research Agreements (Details)

v3.19.1
License, Clinical Trial and Sponsored Research Agreements (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Research and development - licenses acquired $ 3,360 $ 12,433
Sponsored Research And Clinical Trial Agreements [Member]    
Research and development - licenses acquired 5,719 5,557
IL13Ra2 [Member]    
Research and development - licenses acquired 0 500
IL13Ra2 [Member] | Sponsored Research And Clinical Trial Agreements [Member]    
Research and development - licenses acquired 1,056 1,578
IV/ICV [Member]    
Research and development - licenses acquired 0 125
PSCA [Member]    
Research and development - licenses acquired 0 300
HER2 [Member]    
Research and development - licenses acquired 200 600
CS1 [Member]    
Research and development - licenses acquired 0 600
CRISPR [Member] [Member]    
Research and development - licenses acquired 0 250
CRISPR [Member] [Member] | Sponsored Research And Clinical Trial Agreements [Member]    
Research and development - licenses acquired 69 138
Fortress PIK Dividend [Member]    
Research and development - licenses acquired 2,085 9,558
UCLA [Member]    
Research and development - licenses acquired 0 200
Fred Hutch CD20 [Member]    
Research and development - licenses acquired 0 300
Fred Hutch CD20 [Member] | Sponsored Research And Clinical Trial Agreements [Member]    
Research and development - licenses acquired 1,301 614
St Jude XSCID [Member]    
Research and development - licenses acquired 1,000 0
Manufacturing [Member]    
Research and development - licenses acquired 75 0
Manufacturing [Member] | Sponsored Research And Clinical Trial Agreements [Member]    
Research and development - licenses acquired 458 0
City Of Hope [Member] | Sponsored Research And Clinical Trial Agreements [Member]    
Research and development - licenses acquired 2,000 2,000
CD 123 [Member] | Sponsored Research And Clinical Trial Agreements [Member]    
Research and development - licenses acquired $ 835 $ 1,227