Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.3
License, Clinical Trial and Sponsored Research Agreements - Licenses (Details)
 1 Months Ended 3 Months Ended 9 Months Ended
Aug. 23, 2019
USD ($)
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May 31, 2019
USD ($)
Feb. 28, 2019
USD ($)
May 31, 2017
USD ($)
item
Feb. 28, 2017
USD ($)
Sep. 30, 2019
USD ($)
shares
Mar. 31, 2019
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2019
USD ($)
shares
Sep. 30, 2018
USD ($)
Aug. 16, 2019
shares
Aug. 15, 2019
shares
Dec. 31, 2018
shares
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                          
Research and development - licenses acquired           $ 700,000   $ 1,000,000 $ 1,350,000 $ 1,075,000      
Common stock, shares authorized | shares           85,000,000     85,000,000   85,000,000 50,000,000 85,000,000
License Agreements [Member]                          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                          
Research and development - licenses acquired           $ 700,000   1,000,000 $ 1,350,000 1,075,000      
License Agreements [Member] | PSCA Product Or Process [Member]                          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                          
Research and development - licenses acquired           200,000   0 200,000 0      
City Of Hope National Medical Center ("COH") [Member] | License Agreements [Member] | Manufacturing                          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                          
Research and development - licenses acquired           0   0 0 75,000      
City Of Hope National Medical Center ("COH") [Member] | License Agreements [Member] | PSCA Product Or Process [Member]                          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                          
Research and development - licenses acquired   $ 200,000                      
Upfront fees paid       $ 300,000                  
Number of milestones | item       10                  
Milestones payable       $ 14,900,000                  
Annual maintenance fee payable       50,000                  
City Of Hope National Medical Center ("COH") [Member] | License Agreements [Member] | CS1 Product Or Process [Member]                          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                          
Research and development - licenses acquired   $ 200,000       0   0 200,000 0      
Upfront fees paid       $ 600,000                  
Number of milestones | item       10                  
Milestones payable       $ 14,900,000                  
Annual maintenance fee payable       $ 50,000                  
City Of Hope National Medical Center ("COH") [Member] | License Agreements [Member] | CD123 Product Or Process [Member]                          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                          
Research and development - licenses acquired           0 $ 300,000 0 250,000 0      
Milestones payable         $ 14,500,000                
Annual maintenance fee payable         $ 25,000                
UCLA [Member] | License Agreements [Member]                          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                          
Research and development - licenses acquired           300,000   0 300,000 0      
St. Jude Children's Research Hospital [Member] | License Agreements [Member]                          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                          
Research and development - licenses acquired           0   1,000,000 0 1,000,000      
Nationwide Childrens Hospital [Member] | License Agreements [Member]                          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                          
Research and development - licenses acquired           0   0 200,000 0      
Upfront fees paid     $ 200,000                    
Milestones payable     $ 152,800,000                    
Calimmune [Member] | License Agreements [Member]                          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                          
Research and development - licenses acquired           200,000   $ 0 200,000 $ 0      
Upfront fees paid $ 200,000                        
Number of milestones | item 3                        
Milestones payable $ 1,000,000                        
University of California [Member] | License Agreements [Member]                          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                          
Research and development - licenses acquired           $ 300,000     $ 300,000