Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
Licenses Acquired - Summary Of Research and Development Arrangement Contract (Detail) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Apr. 28, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   $ 4,164 $ 5,532 $ 11,408
Fortress [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   300 325 0
Avenue [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   0 0 3,000
Caelum [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   219 0 0
Cellvation [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   0 312 0
Checkpoint [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   400 3,160 3,159
Coronado SO [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   0 0 1,607
Cyprium [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   100 0 0
Escala [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   0 0 1,295
Helocyte [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total $ 200 0 53 200
Mustang [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   2,875 1,682 2,147
Tamid [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total   $ 270 $ 0 $ 0