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Accrued expenses
3 Months Ended
Mar. 31, 2021
Accrued expenses  
Accrued expenses

4. Accrued expenses

Accrued expenses consisted of the following:

(in thousands)

    

March 31, 2021

    

December 31, 2020

Deferred research obligations

$

667

$

Compensation and related benefits

255

845

Professional fees, contractors and other

 

247

 

527

$

1,169

$

1,372