Annual report pursuant to Section 13 and 15(d)

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

v3.19.1
Licenses Acquired - Summary Of Research and Development Arrangement Contract (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total $ 4,050 $ 4,164
Fortress [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total 0 300
Aevitas [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total 1 0
Caelum [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total 252 219
Checkpoint [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total 1,000 400
Cellvation [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total 1 0
Cyprium [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total 0 100
Helocyte [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total 1,521 0
Mustang [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total 1,275 2,875
Tamid [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total $ 0 $ 270