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Other Accounts Payable and Accrued Expenses (Tables)
 12 Months Ended
Dec. 31, 2018
Payables and Accruals [Abstract]  
Schedule of other accounts payable and accrued expenses
   December 31, 
   2018   2017 
         
Royalties - IIA payable  $761   $1,096 
Commissions to distributors   430    429 
Accrued expenses   1,090    1,903 
           
   $2,281   $3,428