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Accrued Liabilities
9 Months Ended
Sep. 30, 2021
Accrued Liabilities  
Accrued Liabilities

5. Accrued Liabilities

Accrued liabilities consist of the following (in thousands):

September 30, 

December 31, 

    

2021

    

2020

    

Accrued compensation

$

942

$

1,697

Accrued professional fees and other

 

2,957

 

1,651

Total accrued liabilities 

$

3,899

$

3,348