Annual report pursuant to Section 13 and 15(d)

Sponsored Research and Clinical Trial Agreements (Schedule of Research and Development for Sponsored Research and Clinical Trial Agreements) (Details)

v3.23.1
Sponsored Research and Clinical Trial Agreements (Schedule of Research and Development for Sponsored Research and Clinical Trial Agreements) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Research and development $ 134,199 $ 113,240
Research and Clinical Trial Agreements [Member]    
Research and development 7,011 7,845
Research and Clinical Trial Agreements [Member] | Cellvation [Member]    
Research and development 11 0
Research and Clinical Trial Agreements [Member] | Checkpoint [Member].    
Research and development 17 0
Research and Clinical Trial Agreements [Member] | Mustang    
Research and development 6,989 6,591
Research and Clinical Trial Agreements [Member] | Aevitas [Member]    
Research and development $ 62 $ 289