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Related parties (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Related parties assets $ 2 $ 3
Trade Payables and Leases 14,020 30,194
Related parties liabilities 4,204 3,935
Trade accounts receivable 885 852
Cash and cash equivalents 42,422 6,744
Dividends payable 3,707 2,830
Cash and cash equivalents current 42,422 6,744
Trade accounts receivable, current 885 852
Trade Payables and Leases, current 10,994 28,747
Dividends payable, current 3,707 2,830
Related parties' liabilities, noncurrent 2 3
Trade Payables and Leases, non current 3,026 1,447
Total assets and liabilities 2 3
Votorantim S. A. [Member]    
IfrsStatementLineItems [Line Items]    
Related parties assets 2 3
Trade Payables and Leases 101 1,985
Related parties liabilities 3,658 2,522
Auren Comercializadora De Energia Ltda [Member]    
IfrsStatementLineItems [Line Items]    
Trade Payables and Leases 907  
Campos Novos Energia SA [Member]    
IfrsStatementLineItems [Line Items]    
Trade Payables and Leases 7,104 14,835
Companhia Brasileira De Aluminio [Member]    
IfrsStatementLineItems [Line Items]    
Trade Payables and Leases 70  
Related parties liabilities 7  
Trade accounts receivable 299 193
Group Andrade Gutierrez [Member]    
IfrsStatementLineItems [Line Items]    
Trade Payables and Leases   10,908
Scotiabank Peru S.A.A [Member]    
IfrsStatementLineItems [Line Items]    
Trade Payables and Leases 5,404 2,202
Cash and cash equivalents 42,422 6,744
Votorantim Cimentos SA [Member]    
IfrsStatementLineItems [Line Items]    
Trade Payables and Leases 412 137
Trade accounts receivable 586 653
Votorantim International CSC SAC [Member]    
IfrsStatementLineItems [Line Items]    
Related parties liabilities 420 891
Other related parties [member]    
IfrsStatementLineItems [Line Items]    
Trade Payables and Leases 22 127
Related parties liabilities 119 522
Trade accounts receivable   6
Dividends payable $ 3,707 $ 2,830