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Other Current Liabilities (Tables)
3 Months Ended
Mar. 31, 2019
Other Liabilities Disclosure [Abstract]  
Schedule of Other Current Liabilities

    US dollars  
    March 31,     December 31,  
    2019     2018  
    (unaudited)        
Employees and related institutions     242,061       239,964  
Accrued expenses and other     883,092       917,386  
      1,125,153       1,157,350