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Intangible assets (Tables)
 12 Months Ended
Dec. 31, 2024
Intangible assets and goodwill [abstract]  
Intangible Assets
Below are the changes in the items:
Amortization
Cost as of
December 31,
2023		AdditionsDisposals (1)Accumulated
as of
December 31,
2023		Disposals (1)For the periodAccumulated
as of
December 31,
2024		Carrying
amount as of
December 31,
2024
Software90,968,518 56,541,430 54,576,390 18,807,400 13,987,925 18,885,133 23,704,608 69,228,950 
Total90,968,518 56,541,430 54,576,390 18,807,400 13,987,925 18,885,133 23,704,608 69,228,950 
Amortization
Cost as of
December 31,
2022		AdditionsDisposals (1)Accumulated
as of
December 31,
2022		Disposals (1)For the periodAccumulated
as of
December 31,
2023		Carrying
amount as of
December 31,
2023
Software80,332,774 19,172,013 8,536,269 15,113,610 4,422,968 8,116,758 18,807,400 72,161,118 
Total80,332,774 19,172,013 8,536,269 15,113,610 4,422,968 8,116,758 18,807,400 72,161,118 
(1)Includes write-off of fully depreciated items.