Annual report pursuant to Section 13 and 15(d)

Geographic information - Operations by Geographic Area - Long-lived Assets (Details)

v3.20.4
Geographic information - Operations by Geographic Area - Long-lived Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Operations by Geographic Area    
Long-lived assets $ 46,658 $ 51,857
Clinical materials 2,503
U.K.    
Operations by Geographic Area    
Long-lived assets 24,329 27,367
U.S.    
Operations by Geographic Area    
Long-lived assets $ 22,329 $ 24,490