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Accrued Expenses
12 Months Ended
Dec. 31, 2020
Accrued Expenses  
Accrued Expenses

6. Accrued Expenses

Accrued expenses consisted of the following (in thousands):

As of

December 31, 

 

2020

    

2019

External research and development expenses

$

12,820

$

735

Employee related expenses

5,323

4,971

Intellectual property and patent related fees

4,240

3,725

Sublicensing expenses

771

11,416

Professional service expenses

533

674

Other expenses

359

599

Total accrued expenses

$

24,046

$

22,120