Annual report pursuant to Section 13 and 15(d)

License, Clinical Trial and Sponsored Research Agreements (Sponsored Research and Clinical Trial Agreements) (Details)

v3.24.0.1
License, Clinical Trial and Sponsored Research Agreements (Sponsored Research and Clinical Trial Agreements) (Details) - USD ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
License, Clinical Trial and Sponsored Research Agreements    
Research and development expense $ 40,513,000 $ 62,475,000
Sponsored Research and Clinical Trial Agreements [Member]    
License, Clinical Trial and Sponsored Research Agreements    
Research and development expense 4,162,000 6,989,000
Mayo Clinic [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
License, Clinical Trial and Sponsored Research Agreements    
Research and development expense 551,000 968,000
CD123 (MB-102) [Member] | City of Hope National Medical Center ("COH") [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
License, Clinical Trial and Sponsored Research Agreements    
Research and development expense 23,000 166,000
IL13Ra2 (MB-101) [Member] | City of Hope National Medical Center ("COH") [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
License, Clinical Trial and Sponsored Research Agreements    
Research and development expense 1,115,000 1,486,000
CS1 (MB-104) [Member] | City of Hope National Medical Center ("COH") [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
License, Clinical Trial and Sponsored Research Agreements    
Research and development expense 188,000 482,000
HER2 (MB 103) [Member] | City of Hope National Medical Center ("COH") [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
License, Clinical Trial and Sponsored Research Agreements    
Research and development expense 0 784,000
PSCA (MB-105) [Member] | City of Hope National Medical Center ("COH") [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
License, Clinical Trial and Sponsored Research Agreements    
Research and development expense 44,000 103,000
CD20 (MB-106) [Member] | Fred Hutchinson Cancer Center [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
License, Clinical Trial and Sponsored Research Agreements    
Research and development expense 1,254,000 1,987,000
ST. Jude - XSCID [Member] | St. Jude Children's Research Hospital [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
License, Clinical Trial and Sponsored Research Agreements    
Research and development expense 637,000 508,000
RAG1 SCID (MB-110) [Member] | Leiden University Medical Centre [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
License, Clinical Trial and Sponsored Research Agreements    
Research and development expense $ 350,000 $ 505,000