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Related parties (Details Narrative) - BRL (R$)
R$ in Thousands
 12 Months Ended
Oct. 30, 2019
Sep. 06, 2018
Apr. 25, 2018
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
R V L Esteves Gestao Imobiliaria S A [Member]            
Reserve Quantities [Line Items]            
Lease expenses           R$ 417
Lease Agreements 1 [Member]            
Reserve Quantities [Line Items]            
Lease term       20 years    
Renewal term       20 years    
Lease Agreements 1 [Member] | R V L Esteves Gestao Imobiliaria S A [Member]            
Reserve Quantities [Line Items]            
Lease expenses       R$ 15,336 R$ 11,288 40
Lease Agreements 1 [Member] | R V L Esteves Gestao Imobiliaria S A [Member] | Instituto Tocantinense Presidente Antonio Carlos S.A. (ITPAC ) [Member]            
Reserve Quantities [Line Items]            
Percentage of revenue   7.50%        
Lease Agreements 1 [Member] | R V L Esteves Gestao Imobiliaria S A [Member] | Instituto De Ensino Superior Presidente Trancredo De Almeida Neves S.A. (IPTAN) [Member]            
Reserve Quantities [Line Items]            
Description of lease term (i) up to June 2022, R$40; (ii) after June 2022 and until December 2028, 6.5% of the monthly net revenue of ITPAC          
Lease Agreements 1 [Member] | U N I V A C O Patrimonial Ltda [Member]            
Reserve Quantities [Line Items]            
Percentage of revenue       6.50%    
Renewal term       20 years    
Lease expenses       R$ 3,210 2,915 2,816
Lease Agreements 1 [Member] | I E S V A P Patrimonial Ltda [Member]            
Reserve Quantities [Line Items]            
Lease term     20 years      
Percentage of revenue     7.50%      
Renewal term     20 years      
Lease expenses       R$ 4,560 R$ 3,470 R$ 2,609
Description of lease term     The lease agreement is for an amount equal to 7.5% of the monthly net revenue of IESVAP during 2018