Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Licenses Acquired - Summary Of Research and Development Arrangement Contract (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total $ 1,294 $ 83
Checkpoint Therapeutics, Inc [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total 400 0
Helocyte [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total 0 83
Mustang Therapeutics, Inc [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total 575 0
Caelum Biosciences, Inc. [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total 219 0
Cyprium Therapeutics, Inc. [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total $ 100 $ 0