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Share-based payments (Tables)
 12 Months Ended
Dec. 31, 2024
Notes and other explanatory information [abstract]  
Schedule of share purchase payment plans
     
   Number of Series A shares
Outstanding as of December 31, 2022   6,579,214 
Purchased during the year   5,847,018 
Exercised/vested during the year   (2,932,479)
Forfeited during the year   (330,453)
Outstanding as of December 31, 2023   9,163,300(1)
Purchased during the year   5,209,713 
Exercised/vested during the year   (3,880,683)
Forfeited during the year   —   
Outstanding as of December 31, 2024   10,492,330(1)
(1) These shares are presented as treasury shares in the consolidated statement of financial position as of December 31, 2024 and 2023.
Schedule of vesting period of shares granted
   
Number of Series A shares   Vesting period
5,070,172   November 2025
3,685,587   November 2026
1,736,571   November 2027
10,492,330    
Schedule of retention plan (benefit) expenses
                  
   2024  2023  2022
Benefit arising from cash-settled share-based payments transactions  US$ (1,131)  US$ (119)  US$ (4,365)
Expense arising from equity-settled share-based payments transactions    6,309     6,048     5,074 
Total expense arising from share-based payments transactions  US$ 5,178   US$ 5,929   US$ 709