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Accrued Expenses (Tables)
9 Months Ended
Sep. 30, 2021
Accrued Expenses [Abstract]  
Summary of Accrued expenses and other current liabilities

Accrued expenses and other current liabilities consisted of the following:

September 30, 2021

December 31, 2020

(in thousands)

    

Accrued employee compensation and benefits

$

5,163

$

6,150

Accrued external research and development expenses

 

2,584

 

1,772

Accrued professional fees

 

1,140

 

940

Deferred rent

 

 

1,389

Other

 

740

 

702

Total

$

9,627

$

10,953