Quarterly report pursuant to Section 13 or 15(d)

Licenses Acquired (Schedule of Research and Development for Licenses Acquired) (Details)

v3.21.2
Licenses Acquired (Schedule of Research and Development for Licenses Acquired) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and development - licenses acquired $ 11,003 $ 1,570 $ 11,129 $ 1,820
Licensing Agreements [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and development - licenses acquired 11,003 1,570 11,129 1,820
Licensing Agreements [Member] | Journey [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and development - licenses acquired 10,000   10,000  
Licensing Agreements [Member] | Mustang [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and development - licenses acquired 1,000 1,300 1,000 1,550
Licensing Agreements [Member] | Aevitas [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and development - licenses acquired 2   27  
Licensing Agreements [Member] | Oncogenuity [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and development - licenses acquired 1 270 1 270
Licensing Agreements [Member] | FBIO Acquisition Corp VIII [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and development - licenses acquired     101  
Licensing Agreements [Member] | City of Hope (COH) [Member] | Mustang [Member] | MB-101 (IL13R2 CAR T for Glioblastoma) [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and development - licenses acquired   333   333
Licensing Agreements [Member] | City of Hope (COH) [Member] | Mustang [Member] | MB-102 (CD 123 CAR T for AML) [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and development - licenses acquired 250 334 250 334
Licensing Agreements [Member] | City of Hope (COH) [Member] | Mustang [Member] | MB-103 (HER2 CAR T) [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and development - licenses acquired       250
Licensing Agreements [Member] | City of Hope (COH) [Member] | Mustang [Member] | MB-105 (PSCA CAR T) [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and development - licenses acquired   333   333
Licensing Agreements [Member] | Fred Hutchinson Cancer Research Center [Member] | Mustang [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and development - licenses acquired   300   300
Licensing Agreements [Member] | Mayo Clinic [Member] | Mustang [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and development - licenses acquired $ 750 $ 0 $ 750 $ 0