Quarterly report pursuant to Section 13 or 15(d)

Sponsored Research Agreements - Additional Information (Detail)

v3.8.0.1
Sponsored Research Agreements - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2017
Jul. 03, 2017
Jun. 30, 2017
Feb. 17, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Checkpoint Therapeutics, Inc [Member]                
Payment of Upfront Fees               $ 2,000,000
Reimbursement Of Cost Recognized As Revenue         $ 100,000 $ 200,000 $ 500,000 700,000
Helocyte Inc [Member] | Checkpoint Therapeutics, Inc [Member]                
Payments For Research And Development Expenses             700,000  
Helocyte Inc [Member] | Pentamer Sponsored Research Agreement [Member]                
Payments For Research And Development Expenses         12,000   24,000  
Payment of Upfront Milestone Fees     $ 1,500,000          
Helocyte Inc [Member] | Pep Vax [Member]                
Payments For Research And Development Expenses         200,000 500,000 700,000 1,500,000
Helocyte Inc [Member] | Triplex [Member]                
Payments For Research And Development Expenses         1,300,000 100,000 2,300,000 1,400,000
Mustang Bio, Inc [Member]                
Research And Development Expense Payable Milestone Payment $ 2,000,000       2,000,000   2,000,000  
Payments For Research And Development Expenses         500,000 $ 500,000 1,500,000 $ 1,500,000
Payment of Upfront Fees       $ 9,300        
Mustang Bio, Inc [Member] | CD20 Technology License [Member]                
Research And Development Expense         88,000,000   88,000,000  
Payment of Upfront Milestone Fees $ 400,000 $ 5,300,000            
City Of Hope [Member]                
Payment of Upfront Fees       0.1        
Revenue Recognition Milestone Method Payments Due       200,000        
City Of Hope [Member] | AR IL-13 License [Member]                
Research And Development Expense         200,000   1,200,000  
City Of Hope [Member] | AR CD123 License [Member]                
Research And Development Expense         $ 600,000   $ 1,200,000  
Payment of Upfront Milestone Fees       20,000        
Revenue Recognition Milestone Method Payments Due Over Three Years       200,000        
Revenue Recognition Milestone Method Payments Due       $ 100,000