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Fair Value Measurement (Tables)
6 Months Ended
Jun. 30, 2020
Fair Value Disclosures [Abstract]  
Schedule of fair value, assets measured on recurring basis
        Fair Value Measurements at June 30, 2020 
       Quoted Prices in Active Markets for
Identical Assets
   Significant Other
Observable
Inputs
   Significant
Unobservable
Inputs
 
   Total   (Level 1)   (Level 2)   (Level 3) 
Assets:                
Short-term investments  $67,505   $
     —
   $67,505   $
     —
 
Foreign currency forward exchange contracts not accounted for using hedge accounting   770    
    770    
 
                     
   $68,275   $
   $68,275   $
 

       Fair Value Measurements at December 31, 2019 
       Quoted Prices in Active Markets for Identical Assets   Significant Other Observable Inputs   Significant Unobservable Inputs 
   Total   (Level 1)   (Level 2)   (Level 3) 
Assets:                
Short-term investments  $60,714   $
     —
   $60,714   $
      —
 
Foreign currency forward exchange contracts accounted for using hedge accounting   16    
 
    16    
 
 
Foreign currency forward exchange contracts not accounted for using hedge accounting   112    
    112    
 
                     
   $60,842   $
   $60,842   $
 
Liabilities:                    
Interest rate swap  $30   $
   $30   $