Quarterly report pursuant to Section 13 or 15(d)

Licenses Acquired (Mustang - Narrative) (Details)

v3.21.2
Licenses Acquired (Mustang - Narrative) (Details)
€ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Sep. 08, 2021
USD ($)
Apr. 01, 2021
USD ($)
Milestone
Aug. 23, 2019
USD ($)
Milestone
Jul. 03, 2017
USD ($)
Milestone
May 31, 2017
USD ($)
Milestone
Oct. 31, 2020
USD ($)
Milestone
Oct. 31, 2020
EUR (€)
Milestone
May 31, 2017
USD ($)
Milestone
Feb. 28, 2017
USD ($)
Milestone
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Research and development acquired                   $ 27,367,000 $ 13,298,000 $ 70,226,000 $ 43,868,000
CSL Behring [Member] | Licensing Agreements [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Payments of milestones                   30,000 $ 200,000 30,000 200,000
Mayo Clinic [Member] | Licensing Agreements [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Upfront fees payment   $ 800,000                   800,000  
Annual maintenance fee payable   $ 25,000                      
Mayo Clinic [Member] | Licensing Agreements [Member] | Achievement Of Eleven Development And Commercial Milestones [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Number of development milestones | Milestone   11                      
Milestone payable on collaborative agreements   $ 92,600,000                      
MB-102 (CD 123 CAR T for AML) [Member] | City of Hope (COH) [Member] | Licensing Agreements [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Payments of milestones                         300,000
MB-102 (CD 123 CAR T for AML) [Member] | City of Hope (COH) [Member] | Licensing Agreements [Member] | Achievement Of Eight Development Milestones [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Number of development milestones | Milestone                 8        
Milestone payable on collaborative agreements                 $ 14,500,000        
MB-102 (CD 123 CAR T for AML) [Member] | City of Hope (COH) [Member] | Licensing Agreements [Member] | Upon the Twentyfourth Patient Treated In Phase1 Clinical Study [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Payments of milestones                       300,000  
MB-105 (PSCA CAR T) [Member] | City of Hope (COH) [Member] | Licensing Agreements [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Upfront fees payment               $ 300,000          
Annual maintenance fee payable               $ 50,000          
MB-105 (PSCA CAR T) [Member] | City of Hope (COH) [Member] | Licensing Agreements [Member] | Achievement of Ten Development Milestones [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Number of development milestones | Milestone               10          
Milestone payable on collaborative agreements               $ 14,900,000          
MB-105 (PSCA CAR T) [Member] | City of Hope (COH) [Member] | Licensing Agreements [Member] | Upon the Twelfth Patient Dosed in a Phase 1 Clinical Study [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Payments of milestones                   300,000   300,000  
MB-106 (CD20 CAR T) [Member] | Leiden University Medical Centre [Member] | Licensing Agreements [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Upfront fees payment $ 400,000                 400,000   400,000  
MB-106 (CD20 CAR T) [Member] | Leiden University Medical Centre [Member] | Licensing Agreements [Member] | Achievement Of Certain Development Milestones [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Milestone payable on collaborative agreements $ 31,000,000                        
MB-106 Car T Therapy [Member] | Fred Hutchinson Cancer Research Center [Member] | Licensing Agreements [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Upfront fees payment       $ 300,000                  
Payments of milestones                         300,000
Annual maintenance fee payable       $ 50,000                  
MB-106 Car T Therapy [Member] | Fred Hutchinson Cancer Research Center [Member] | Licensing Agreements [Member] | Achievement Of Eleven Development Milestones [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Number of development milestones | Milestone       11                  
Milestone payable on collaborative agreements       $ 39,100,000                  
Mb107 and Mb207 (XSCID) [Member] | CSL Behring [Member] | Licensing Agreements [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Upfront fees payment     $ 200,000                    
Mb107 and Mb207 (XSCID) [Member] | CSL Behring [Member] | Licensing Agreements [Member] | Achievement of Three Development And Commercial Milestones [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Number of development milestones | Milestone     3                    
Milestone payable on collaborative agreements     $ 1,200,000                    
MB-103 (HER2 CAR T) [Member] | City of Hope (COH) [Member] | Licensing Agreements [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Upfront fees payment         $ 600,000                
Annual maintenance fee payable         $ 50,000                
MB-103 (HER2 CAR T) [Member] | City of Hope (COH) [Member] | Licensing Agreements [Member] | Achievement of Ten Development Milestones [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Number of development milestones | Milestone         10                
Milestone payable on collaborative agreements         $ 14,900,000                
MB-103 (HER2 CAR T) [Member] | City of Hope (COH) [Member] | Licensing Agreements [Member] | Upon the Twelfth Patient Dosed in a Phase 1 Clinical Study [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Payments of milestones                         300,000
MB-101 (IL13R2 CAR T for Glioblastoma) [Member] | City of Hope (COH) [Member] | Licensing Agreements [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Research and development acquired                         300,000
MB-101 (IL13R2 CAR T for Glioblastoma) [Member] | City of Hope (COH) [Member] | Licensing Agreements [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Payments of milestones                         $ 300,000
MB-101 (IL13R2 CAR T for Glioblastoma) [Member] | City of Hope (COH) [Member] | Licensing Agreements [Member] | Achievement Of Eight Development Milestones [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Number of development milestones | Milestone                 8        
Milestone payable on collaborative agreements                 $ 14,500,000        
MB-207 (LentiBOOST) [Member] | SIRION Biotech [Member] | Licensing Agreements [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Upfront fees payment           $ 100,000 € 0.1            
Research and development acquired                   $ 100,000   $ 100,000  
MB-207 (LentiBOOST) [Member] | SIRION Biotech [Member] | Licensing Agreements [Member] | Achievement of Five Development Milestones [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Number of development milestones | Milestone           5 5            
Milestone payable on collaborative agreements           $ 5,600,000 € 4.7            
MB-207 (LentiBOOST) [Member] | SIRION Biotech [Member] | Licensing Agreements [Member] | Achievement of Three Commercial Milestones [Member] | Mustang [Member]                          
Research and Development Arrangement, Contract to Perform for Others [Line Items]                          
Milestone payable on collaborative agreements           $ 4,100,000 € 3.5            
Number of commercial milestones | Milestone           3 3