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Accrued Expenses
12 Months Ended
Dec. 31, 2021
Payables and Accruals [Abstract]  
Accrued Expenses

6. Accrued Expenses

Accrued expenses consist of the following (in thousands):

 

 

 

As of December 31,

 

 

 

2021

 

 

2020

 

Payroll and employee-related costs

 

$

23,661

 

 

$

22,402

 

Research costs

 

 

47,986

 

 

 

21,684

 

Licensing fees

 

 

138

 

 

 

1,401

 

Professional fees

 

 

4,720

 

 

 

1,670

 

Intellectual property costs

 

 

6,120

 

 

 

3,625

 

Accrued property and equipment

 

 

7,113

 

 

 

2,835

 

Other

 

 

1,265

 

 

 

165

 

Total

 

$

91,003

 

 

$

53,782