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Accrued expenses
 6 Months Ended
Jun. 30, 2022
Payables and Accruals [Abstract]  
Accrued expenses

6. Accrued expenses

Accrued expenses consist of the following:

 

(in thousands)

 

June 30,
2022

 

 

December 31,
2021

 

Accrued external research and development expenses

 

$

6,657

 

 

$

5,041

 

Employee compensation and related benefits

 

 

3,682

 

 

 

6,050

 

License and milestone payments

 

 

3,330

 

 

 

—

 

Professional fees

 

 

1,961

 

 

 

1,109

 

Other

 

 

2,990

 

 

 

792

 

Total

 

$

18,620

 

 

$

12,992