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Interest income (Tables)
 12 Months Ended
Dec. 31, 2024
Notes and other explanatory information [abstract]  
Schedule of Interest Income

 

   Year ended
December 31, 2024		   Year ended
December 31, 2023		 
Interest income from        
Bank deposits  $22,580   $19,582 
Guarantee deposits   23,862    - 
Long-term receivables (including current portion)   218,168    316,793 
Total Interest Income  $264,610   $336,375