Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
Licenses Acquired - Summary Of Research and Development Arrangement Contract (Detail) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Apr. 28, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   $ 5,532 $ 11,408 $ 0
Fortress [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   325 0 0
Avenue Therapeutics, Inc. [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   0 3,000 0
Checkpoint Therapeutics, Inc [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   3,160 3,159 0
Coronado SO Co, Inc [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   0 1,607 0
Helocyte [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total $ 200 53 200 0
Mustang Therapeutics, Inc [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   1,682 2,147 0
Escala [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   0 1,295 0
Cellvation [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   $ 312 $ 0 $ 0