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Other Current Liabilities (Tables)
6 Months Ended
Jun. 30, 2019
Other Liabilities Disclosure [Abstract]  
Schedule of Other Current Liabilities

   US dollars 
   June 30, 2019   December 31, 2018 
   (unaudited)     
         
Employees and related institutions   264,778    239,964 
Accrued expenses and other   612,436    917,386 
    877,214    1,157,350