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Accrued Expenses (Tables)
12 Months Ended
Dec. 31, 2020
Payables And Accruals [Abstract]  
Summary of Accrued Expenses

Accrued expenses consisted of:

 

   
     As of  
(in thousands)   

December 31,

2020

    

December 31,

2019

 

Accrued liabilities

     

Accrued payroll and related expenses

   $       6,686      $       4,954  

Accrued operating expenses

     1,545        754  

Other accrued expenses

     975        876  
  

 

 

 

Total accrued liabilities

   $ 9,206      $ 6,584