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Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2023
Goodwill and Intangible Assets [Abstract]  
Schedule of Definite-Lived Intangible Assets Definite-lived intangible assets:
   December 31, 
   2 0 2 3   2 0 2 2 
   U.S. dollars in thousands 
         
Core technology  $312   $312 
Customer relationships   545    545 
    857    857 
Less – accumulated amortization   (586)   (524)
    271    333 
Functional currency translation adjustments   (6)   41 
Total intangible assets, net  $266   $374 
Schedule of Goodwill Goodwill
   Billing and
related services		  

 

Messaging

  

 

Total

 
   U.S. dollars in thousands 
             
Balance as of January 1, 2022  $5,430   $2,499   $7,929 
Changes during the year ended December 31, 2022:               
Functional currency translation adjustments   -    (144)   (144)
Balance as of December 31, 2022  $5,430   $2,355   $7,785 
Changes during the year ended December 31, 2023:               
Functional currency translation adjustments   -    87    87 
Balance as of December 31, 2023  $5,430   $2,442   $7,872