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Transactions and Balances with Related Parties (Tables)
12 Months Ended
Dec. 31, 2021
Disclosure of related party [text block] [Abstract]  
Schedule of compensation to key management personnel for employee services
   Year ended December 31, 
   2021   2020   2019 
   U.S. dollars in thousands 
             
Salaries, management and consulting fees and other short-term benefits   239    276    290 
Pension, post retirement and other benefits   
-
    2    7 
Share-based payments   37    51    5 
                
    276    329    302 
                
Number of persons   8    8    8