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Accrued Expenses (Tables)
3 Months Ended
Mar. 31, 2022
Accrued Expenses  
Schedule of accrued expenses

Accrued expenses consisted of the following (in thousands):

As of

March 31, 

December 31, 

    

2022

    

2021

Employee related expenses

$

5,581

$

10,159

External research and development expenses

5,392

5,614

Intellectual property and patent related fees

2,967

1,408

Professional service expenses

1,037

2,345

Other expenses

810

666

Total accrued expenses

$

15,787

$

20,192