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Other Accounts Receivable and Prepaid Expenses (Tables)
12 Months Ended
Dec. 31, 2018
Receivables [Abstract]  
Schedule of other accounts receivable and prepaid expenses

 

   December 31, 
   2017   2018 
         
Prepaid expenses  $2,659   $3,712 
Government authorities   4,900    2,053 
Related parties   314    303 
Other   770    961 
           
   $8,643   $7,029