v3.26.1
Commitments and contingencies (Tables)
12 Months Ended
Dec. 31, 2025
Notes and other explanatory information [abstract]  
Schedule of commitment expenditures
         
   Commitment
2026   US$   355,253 
2027       593,684 
2028       1,137,129 
2029       1,367,682 
2030 and thereafter       2,923,055 
.   US$   6,376,803 
Schedule of aircraft sale prices estimated
         
   Aircraft sale prices estimated
          
2026   US$   332,000 
Schedule of future lease payments for non-cancellable sale and leaseback contracts
         
   Aircraft leases
      
2026   US$   15,876 
2027       23,828 
2028       23,828 
2029       23,828 
2030 and thereafter       198,574 
    US$   285,934