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Share capital and additional paid-in capital (Tables)
 12 Months Ended
Dec. 31, 2023
Notes and other explanatory information [abstract]  
Schedule of share capital and additional paid-in capital
           
     Share capital     Additional paid-in capital     Total 
             
Balance at December 31, 2021             348,647                4,646             353,293
Payment of Other reserve constitution - Share-based compensation plan                        -                     28                     28
Balance at December 31, 2022             348,647                4,674             353,321
             
Payment of Other reserve constitution - Share-based compensation plan                       -                     42                     42
Balance at December 31, 2023             348,647                4,716             353,363