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Related Party Balances and Transactions (Tables)
 12 Months Ended
Dec. 31, 2018
Balances with related parties [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Schedule of balances and trasactions with related parties
  December 31, 
   2018   2017 
Assets:        
         
Trade receivables, net  $13,596   $14,329 
Other accounts receivable and prepaid expenses  $-   $2 
           
Liabilities:          
           
Trade payables  $81   $63 
Other accounts payables and accrued expenses  $12   $140 
Transactions with related parties [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Schedule of balances and trasactions with related parties
  Year ended December 31, 
   2018   2017   2016 
             
Revenues  $16,369   $24,559   $18,461 
                
Expenses:               
                
Cost of revenues  $163   $201   $210 
                
Operating expenses:               
                
Research and development, net  $507   $371   $224 
Sales and marketing, net  $212   $217   $142 
General and administrative  $191   $293   $250 
                
Capital expenses  $40   $9   $21