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Schedule of trade accounts receivable, net and notes receivable (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
IfrsStatementLineItems [Line Items]    
Trade receivables, gross R$ 450,806 R$ 342,924
(-) Allowance for doubtful accounts (45,013) (32,980)
Trade receivables, net 405,793 309,944
Current 378,351 302,317
Non-current 27,442 7,627
Tuition Fees [Member]    
IfrsStatementLineItems [Line Items]    
Trade receivables, gross 279,915 195,318
Educational Content [Member]    
IfrsStatementLineItems [Line Items]    
Trade receivables, gross [1] 69,227 62,931
F I E S [Member]    
IfrsStatementLineItems [Line Items]    
Trade receivables, gross 61,342 49,425
Educational Credits [Member]    
IfrsStatementLineItems [Line Items]    
Trade receivables, gross 5,375 11,248
Mobile App Subscription [Member]    
IfrsStatementLineItems [Line Items]    
Trade receivables, gross [2] 20,946 13,526
Others [Member]    
IfrsStatementLineItems [Line Items]    
Trade receivables, gross R$ 14,001 R$ 10,476
[1] Related to trade receivables from sales of printed books, e-books and medical courses through digital platform from Medcel.
[2] Related to trade receivables from mobile applications subscriptions for digital medical content.