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12 Financial assets and financial liabilities (Details Narrative)
R$ in Thousands
 12 Months Ended
May 09, 2019
Dec. 05, 2018
Dec. 31, 2020
BRL (R$)
Dec. 31, 2019
BRL (R$)
Number
Aug. 13, 2019
BRL (R$)
Disclosure of redesignated financial assets and liabilities [line items]          
Contractual lease term     1 year 1 year  
Amount recognized lease expense from short-term leases and low-value assets     R$ 2,555 R$ 4,494  
Foreign Currency Risk [Member]          
Disclosure of redesignated financial assets and liabilities [line items]          
Percentage of sensitivity change in the Euro exchange rate       10.00%  
Closing foreign exchange rate | Number       4.439  
Foreign Currency Risk [Member] | Euro          
Disclosure of redesignated financial assets and liabilities [line items]          
Closing foreign exchange rate | Number       1.00  
Instituto de pesquisa e ensino medico do estado de minas gerais ltda. ("IPEMED") [member]          
Disclosure of redesignated financial assets and liabilities [line items]          
Description of Installments payable Five equal installments        
FADEP - Faculdade Educacional De Pato Branco Ltda. ("FADEP") [Member]          
Disclosure of redesignated financial assets and liabilities [line items]          
Description of Installments payable   The first installment was paid in June 2019, the second installment was paid in December 2019, and the last installment is due in June 2020.      
Instituto Paraense De Educacao E Cultura Ltda. (IPEC) [Member]          
Disclosure of redesignated financial assets and liabilities [line items]          
Cash on the transaction closing date         R$ 54,000
Bottom of Range [Member]          
Disclosure of redesignated financial assets and liabilities [line items]          
Contractual lease term     5 years    
Top of Range [member]          
Disclosure of redesignated financial assets and liabilities [line items]          
Contractual lease term     30 years    
CashEquivalentMember | Foreign Currency Risk [Member]          
Disclosure of redesignated financial assets and liabilities [line items]          
Exposure risk     R$ 70,523 R$ 2,529