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Financing Income, Net (Tables)
3 Months Ended
Mar. 31, 2019
Other Income and Expenses [Abstract]  
Schedule of Financing Income, Net

    US dollars  
    Three-month period 
ended March 31,
 
    2019     2018  
    (unaudited)  
Israeli CPI linkage difference on principal of loans from stockholders     (523 )     911  
Exchange rate differences     8,063       (13,627 )
Interest expenses on credit from banks and other     (4,140 )     (3,216 )
Change in fair value of Warrants with down round protection             77,947  
                 
      3,400       62,015