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Reportable Segments (Tables)
 12 Months Ended
Dec. 31, 2022
Reportable Segments [Abstract]  
Schedule of reportable segments using discrete asset information
   Year Ended December 31, 2022 
   Billing and Related Services   Messaging   Total 
   U.S. dollars in thousands 
             
Revenues  $13,888   $7,663   $21,551 
                
Operating income  $5,105   $419   $5,524 

 

   Year Ended December 31, 2021 
   Billing and Related Services   Messaging   Total 
   U.S. dollars in thousands 
             
Revenues  $14,355   $11,976   $26,331 
                
Operating income  $4,818   $2,010   $6,828 

 

   Year Ended December 31, 2020 
   Billing and Related Services   Messaging   Total 
   U.S. dollars in thousands 
             
Revenues  $14,628   $8,746   $23,374 
                
Operating income  $4,412   $1,051   $5,463