Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
License, Clinical Trial and Sponsored Research Agreements - Licenses (Details)
 1 Months Ended 3 Months Ended 6 Months Ended
Jul. 03, 2017
USD ($)
installment
May 31, 2017
USD ($)
item
Feb. 28, 2017
USD ($)
item
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]              
Research and development - licenses acquired       $ 1,300,000 $ 200,000 $ 1,550,000 $ 650,000
License Agreements [Member]              
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]              
Research and development - licenses acquired       1,300,000 200,000 1,550,000 650,000
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       334,000 0 334,000 250,000
Number of milestones | item     8        
Milestones payable     $ 14,500,000 300,000   300,000  
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       0 200,000 0 200,000
City Of Hope National Medical Center ("COH") [Member] | License Agreements [Member] | IL13Ra2 Product [Member]              
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]              
Research and development - licenses acquired       333,000 0 333,000 0
Number of milestones     8        
Milestones payable     $ 14,500,000 300,000   300,000  
City Of Hope National Medical Center ("COH") [Member] | License Agreements [Member] | Spacer Technology Product or Process [Member]              
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]              
Research and development - licenses acquired       333,000 0 333,000 0
Number of milestones     1        
City Of Hope National Medical Center ("COH") [Member] | License Agreements [Member] | HER2 Product Or Process [Member]              
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]              
Research and development - licenses acquired       0 0 250,000 0
Number of milestones | item   10          
Milestones payable   $ 14,900,000   300,000   300,000  
Nationwide Childrens Hospital [Member] | License Agreements [Member]              
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]              
Research and development - licenses acquired       0 0 0 200,000
Fred Hutchinson Cancer Research Center[Member] | License Agreements [Member]              
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]              
Research and development - licenses acquired       300,000 $ 0 300,000 $ 0
Fred Hutchinson Cancer Research Center[Member] | License Agreements [Member] | Fred Hutch CD 20 [Member]              
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]              
Upfront fees paid $ 300,000            
Number of milestones | installment 11            
Milestones payable $ 39,100,000     $ 300,000   $ 300,000  
Annual maintenance fee payable $ 50,000