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Trade accounts receivable (Tables)
12 Months Ended
Dec. 31, 2025
Notes and other explanatory information [abstract]  
Schedule of trade accounts receivable
          
   12/31/2025  12/31/2024
Accounts receivable from customers   1,392    18,013 
Provisional price adjustment         (6,429)
Trade accounts receivable   1,392    11,584