Quarterly report pursuant to Section 13 or 15(d)

Clinical Trial and Sponsored Research Agreements (Other - Sponsored Research and Clinical Trial Agreements) (Narrative) (Details)

v3.23.3
Clinical Trial and Sponsored Research Agreements (Other - Sponsored Research and Clinical Trial Agreements) (Narrative) (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Sep. 08, 2021
Jul. 03, 2017
Oct. 31, 2022
Jan. 31, 2022
Jun. 30, 2021
Nov. 30, 2020
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
License, Clinical Trial and Sponsored Research Agreements                    
Research and development expense             $ 9,477 $ 15,419 $ 34,313 $ 46,872
Sponsored Research and Clinical Trial Agreements [Member]                    
License, Clinical Trial and Sponsored Research Agreements                    
Research and development expense             364 1,836 3,739 4,884
Fred Hutchinson Cancer Center [Member] | CD20 (MB-106) [Member]                    
License, Clinical Trial and Sponsored Research Agreements                    
Total reimbursement payments made             8,400   8,400  
Fred Hutchinson Cancer Center [Member] | Sponsored Research and Clinical Trial Agreements [Member] | CD20 (MB-106) [Member]                    
License, Clinical Trial and Sponsored Research Agreements                    
Milestones payable   $ 5,300                
Additional milestone payments       $ 2,200   $ 1,800        
Research and development expense             142 132 1,239 978
St. Jude Children's Research Hospital [Member] | ST. Jude - XSCID [Member]                    
License, Clinical Trial and Sponsored Research Agreements                    
Total reimbursement payments made             3,500   3,500  
Mayo Clinic [Member]                    
License, Clinical Trial and Sponsored Research Agreements                    
Total reimbursement payments made             2,200   2,200  
Mayo Clinic [Member] | Sponsored Research and Clinical Trial Agreements [Member]                    
License, Clinical Trial and Sponsored Research Agreements                    
Research and development expense               269 551 731
Mayo Clinic [Member] | Sponsored Research and Clinical Trial Agreements [Member] | Car T Technology [Member]                    
License, Clinical Trial and Sponsored Research Agreements                    
Milestones payable         $ 2,100          
Agreement term         2 years          
Mayo Clinic [Member] | Clinical Trial Agreements [Member] | Car T Technology [Member]                    
License, Clinical Trial and Sponsored Research Agreements                    
Milestones payable     $ 100              
Leiden University Medical Centre [Member] | Sponsored Research and Clinical Trial Agreements [Member] | RAG1 SCID (MB-110) [Member]                    
License, Clinical Trial and Sponsored Research Agreements                    
Research and development expense             $ 125 $ 92 $ 349 $ 357
Agreement term 5 years