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Cash and cash equivalents (Tables)
 12 Months Ended
Dec. 31, 2024
Notes and other explanatory information [abstract]  
Schedule of Cash and Cash Equivalents

   As of   As of 
   December 31, 2024   December 31, 2023 
Cash on hand and petty cash  $1,980   $2,468 
Checking accounts and demand deposits   647,126    556,994 
Cash and cash equivalents  $649,106   $559,462