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Financing Income (Expenses), Net (Tables)
9 Months Ended
Sep. 30, 2020
Other Income and Expenses [Abstract]  
Schedule of Financing Income (Expenses), Net
    US dollars     US dollars  
    Nine-month period ended September 30,     Three-month period ended September 30,  
    2020     2019     2020     2019  
    (Unaudited)     (Unaudited)  
Israeli CPI linkage difference on principal of loans from stockholders     1,335       (5,708 )     (171 )     (1,843 )
Exchange rate differences     (4,499 )     1,808       2,020       (8,761 )
Interest income on credit in bank     105,072       -       47,833       -  
Others     (2,930 )     (13,555 )     (9,437 )     (5,700 )
      98,978       (17,455 )     40,245       (16,304 )