Quarterly report pursuant to Section 13 or 15(d)

Licenses Acquired - License as recorded in the Condensed Consolidated Statements of Operations (Details)

v3.19.3
Licenses Acquired - License as recorded in the Condensed Consolidated Statements of Operations (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total licenses acquired expense $ 700 $ 3,706 $ 1,350 $ 3,804
Helocyte [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total licenses acquired expense   1,500   1,521
Checkpoint [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total licenses acquired expense   1,000   1,000
Caelum [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total licenses acquired expense   201   201
Mustang [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total licenses acquired expense $ 700 1,000 $ 1,350 1,075
Aevitas [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total licenses acquired expense   $ 5   6
Cellvation [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Total licenses acquired expense       $ 1