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Accrued Expenses and Other Liabilities (Tables)
3 Months Ended
Mar. 31, 2020
Payables and Accruals [Abstract]  
Schedule of Accrued Expenses and Other Liabilities
Accrued expenses and other liabilities consisted of the following (in thousands):
 
March 31,
2020
 
December 31,
2019
Compensation and benefits
$
3,408

 
$
6,568

Research and development costs
14,173

 
10,449

UCLB milestone and option
810

 
663

Professional fees
3,125

 
2,611

U.S. Corporate and local tax

 
391

Other liabilities
955

 
716

Total accrued expenses and other liabilities
$
22,471

 
$
21,398