Annual report pursuant to Section 13 and 15(d)

Licenses Acquired - Summary Of Research and Development Arrangement Contract (Detail)

v3.3.1.900
Licenses Acquired - Summary Of Research and Development Arrangement Contract (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Research and Development Total $ 11,408 $ 0 $ 0
Mustang Therapeutics, Inc [Member]      
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Research and Development Total 2,147    
Checkpoint Therapeutics, Inc [Member]      
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Research and Development Total 3,159    
Coronado SO Co, Inc [Member]      
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Research and Development Total 1,607    
Helocyte [Member]      
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Research and Development Total 200    
Escala [Member]      
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Research and Development Total 1,295    
Avenue Therapeutics, Inc. [Member]      
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Research and Development Total $ 3,000