Quarterly report pursuant to Section 13 or 15(d)

Licenses Acquired - Mustang expenses (Details)

v3.20.2
Licenses Acquired - Mustang expenses (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total Research and Development - Licenses Acquired $ 458 $ 700 $ 2,278 $ 1,350
Mustang [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total Research and Development - Licenses Acquired 287 700 1,837 1,350
Mustang [Member] | City of Hope (COH) - CD123 (MB-102) [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total Research and Development - Licenses Acquired 0 0 334 250
Mustang [Member] | City of Hope (COH) - IL13R2 (MB-101) [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total Research and Development - Licenses Acquired 0 0 333 0
Mustang [Member] | City of Hope (COH) - HER2 (MB-103) [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total Research and Development - Licenses Acquired 0 0 250 0
Mustang [Member] | City of Hope (COH) - CSI (MB-104) [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total Research and Development - Licenses Acquired 0 0 0 200
Mustang [Member] | City of Hope (COH) - Spacer [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total Research and Development - Licenses Acquired 0 200 333 200
Mustang [Member] | Fred Hutch - CD20 CAR T (MB-106) [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total Research and Development - Licenses Acquired 0 0 300 0
Mustang [Member] | Nationwide Children's Hospital - C134 (MB-108) [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total Research and Development - Licenses Acquired 0 0 0 200
Mustang [Member] | CSL Behring (Calimmune) [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total Research and Development - Licenses Acquired 170 200 170 200
Mustang [Member] | UCLA [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total Research and Development - Licenses Acquired 0 300 0 300
Mustang [Member] | SIRION LentiBOOST [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total Research and Development - Licenses Acquired $ 117 $ 0 $ 117 $ 0