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Other Current Liabilities (Tables)
 12 Months Ended
Dec. 31, 2018
Other Liabilities Disclosure [Abstract]  
Schedule of Other Current Liabilities

    US dollars  
    December 31,  
    2018     2017  
             
Employees and related institutions     239,964       336,783  
Accrued expenses and other     917,386       929,171  
      1,157,350       1,265,954