Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
License, Clinical Trial and Sponsored Research Agreements - Additional Information (Details) - USD ($)
1 Months Ended
Feb. 28, 2019
May 31, 2017
Feb. 28, 2017
May 31, 2019
Mar. 31, 2019
City of Hope | CS1 License (MB-104) [Member]          
Payment Of Upfront Fees   $ 600,000      
Revenue Recognition Milestone Method Payments Due   14,900,000      
Cost of Goods and Services Sold   $ 50,000      
Research And Development Expense, Sponsored Research Payment       $ 200,000  
City of Hope | CD123 License (MB-102) [Member]          
Revenue Recognition Milestone Method Payments Due     $ 14,500,000    
Cost of Goods and Services Sold     $ 25,000    
Research And Development Expense, Sponsored Research Payment         $ 300,000
Nationwide Children's Hospital - C134          
Payment Of Upfront Fees $ 200,000        
Licensing Arrangements Additional Costs Incurred $ 152,800,000