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Operating expenses (Tables)
 3 Months Ended
Mar. 31, 2021
Operating Expenses [Abstract]  
Schedule of Information About Operating Expenses
The following provides information about operating expenses (in thousands):
 
    
Three Months Ended March 31,
  
     2021      2020  
Compensation and employee benefits
   
$
   19,891     
$
   18,018  
Selling and marketing
      13,865        29,742  
General and administrative
      8,651        9,429  
Research and development
      2,050        3,269  
    
 
 
     
 
 
  
Total operating expenses
   
$
 44,457     
$
 60,458