XML 33 R39.htm IDEA: XBRL DOCUMENT v3.20.1
Accrued Expenses and Other Liabilities (Details)
$ in Thousands, £ in Millions
Mar. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Mar. 31, 2018
GBP (£)
Payables and Accruals [Abstract]      
Compensation and benefits $ 3,408 $ 6,568  
Research and development costs 14,173 10,449  
UCLB milestone and option 810 663 £ 0.5
Professional fees 3,125 2,611  
U.S. Corporate and local tax 0 391  
Other liabilities 955 716  
Total accrued expenses and other liabilities $ 22,471 $ 21,398