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Prepaid Assets and Accrued Expenses (Tables)
3 Months Ended
Mar. 31, 2021
Prepaid Assets And Accrued Expenses [Abstract]  
Schedule of Accrued Expenses

Accrued expenses are as follows (in thousands):

 

 

 

March 31,

 

 

December 31,

 

 

 

2021

 

 

2020

 

Accrued research and development

 

$

32,586

 

 

$

47,879

 

Accrued license fee

 

 

 

 

 

25,050

 

Accrued payroll liabilities

 

 

11,857

 

 

 

22,896

 

Other

 

 

24,955

 

 

 

16,110

 

Total

 

$

69,398

 

 

$

111,935