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Other Current Liabilities (Tables)
6 Months Ended
Jun. 30, 2018
Other Liabilities Disclosure [Abstract]  
Schedule of Other Current Liabilities

    US dollars  
    June 30, 2018     December 31, 2017  
    (unaudited)        
             
Employees and related institutions     318,411       336,783  
Accrued expenses and other     1,266,463       929,171  
      1,584,874       1,265,954