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Other Accounts Receivable and Prepaid Expenses (Tables)
 12 Months Ended
Dec. 31, 2017
Other Accounts Receivable and Prepaid Expenses [Abstract]  
Schedule of other accounts receivable and prepaid expenses
   December 31, 
   2017  2016 
        
 Indirect taxes $118  $58 
 

Grant receivables

  740   46 
 Prepaid expenses and advances to suppliers  460   708 
 Related party (see note 12a5)  2   585 
 Tax balance to receive from customers  862   461 
 Project deferred costs  372   - 
 Others  131   102 
          
   $2,685  $1,960