Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
License, Clinical Trial and Sponsored Research Agreements (License Agreements) (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]        
Research and development for licenses acquired $ 630,000 $ 287,000 $ 1,630,000 $ 1,837,000
License Agreements [Member]        
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]        
Research and development for licenses acquired 630,000 287,000 1,630,000 1,837,000
Leiden University Medical Centre [Member] | License Agreements [Member]        
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]        
Research and development for licenses acquired 350,000 0 350,000 0
CD123 (MB-102) [Member] | City of Hope National Medical Center ("COH") [Member] | License Agreements [Member]        
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]        
Research and development for licenses acquired 0 0 250,000 334,000
IL13Ra2 (MB-101) [Member] | City of Hope National Medical Center ("COH") [Member] | License Agreements [Member]        
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]        
Research and development for licenses acquired 0 0 0 333,000
Spacer [Member] | City of Hope National Medical Center ("COH") [Member] | License Agreements [Member]        
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]        
Research and development for licenses acquired 0 0 0 333,000
PSCA (MB-105) [Member] | City of Hope National Medical Center ("COH") [Member] | License Agreements [Member]        
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]        
Research and development for licenses acquired 250,000 0 250,000 0
HER2 (MB 103) [Member] | City of Hope National Medical Center ("COH") [Member] | License Agreements [Member]        
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]        
Research and development for licenses acquired 0 0 0 250,000
CD20 (MB-106) [Member] | Fred Hutchinson Cancer Research Center [Member] | License Agreements [Member]        
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]        
Research and development for licenses acquired 0 0 0 300,000
XSCID (MB-107 and MB-207) [Member] | CSL Behring (Calimmune) [Member] | License Agreements [Member]        
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]        
Research and development for licenses acquired 30,000 170,000 30,000 170,000
Car T Technology [Member] | Mayo Clinic [Member] | License Agreements [Member]        
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]        
Research and development for licenses acquired 0 0 750,000 0
LentiBOOST Technology [Member] | SIRION Biotech [Member] | License Agreements [Member]        
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]        
Research and development for licenses acquired $ 0 $ 117,000 $ 0 $ 117,000