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Employee benefits (Details - Textuals)
R$ in Thousands
12 Months Ended
Dec. 31, 2021
BRL (R$)
Employee benefits  
Maximum percentage of employees' salary to be paid as contribution by participating entities in defined benefit plan 4.00%
Consideration to be paid by participants in defined benefit plan R$ 0
Post-employment obligations 0
Other long-term benefits R$ 0