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Schedule of revenue by segment (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
IfrsStatementLineItems [Line Items]      
Types of services or goods R$ 1,719,371 R$ 1,201,191 R$ 750,630
Tuition fees [1] 2,124,589 1,388,735 856,561
Tuition fees 1,559,094 1,104,252 709,152
Other 160,277 96,939 41,478
Timing of revenue recognition 1,719,371 1,201,191 750,630
Transferred over time 1,640,889 1,128,558 713,827
Transferred at a point in time 78,482 72,633 36,803
Undergrad [Member]      
IfrsStatementLineItems [Line Items]      
Types of services or goods 1,498,408 1,002,461 653,760
Tuition fees 1,486,111   648,957
Other 12,297 5,406 4,803
Timing of revenue recognition 1,498,408 1,002,461 653,760
Transferred over time 1,486,111 997,055 648,957
Transferred at a point in time 12,297 5,406 4,803
Continuing Education [Member]      
IfrsStatementLineItems [Line Items]      
Types of services or goods 72,983 107,197 64,870
Tuition fees 72,983   60,195
Tuition fees   107,197  
Other     4,675
Timing of revenue recognition 72,983 107,197 64,870
Transferred over time 72,983 107,197 64,870
Transferred at a point in time    
Digital Services [Member]      
IfrsStatementLineItems [Line Items]      
Types of services or goods 151,958 93,152 35,880
Tuition fees    
Other 151,958 93,152 35,880
Timing of revenue recognition 151,958 93,152 35,880
Transferred over time 81,795 24,306  
Transferred at a point in time 70,163 68,846 35,880
Elimination of intersegment amounts [member]      
IfrsStatementLineItems [Line Items]      
Types of services or goods (3,978) (1,619) (3,880)
Tuition fees    
Other (3,978) (1,619) (3,880)
Timing of revenue recognition (3,978) (1,619) (3,880)
Transferred at a point in time R$ (3,978) (1,619) R$ (3,880)
Segment Of Business One Unit [Member]      
IfrsStatementLineItems [Line Items]      
Tuition fees   R$ 997,055  
[1] As mentioned in Note 1, the Company assessed, in connection with the social distancing requirements, whether it has satisfied all performance obligations of its contracts with customers, according to IFRS15, and concluded it was necessary to defer a portion of its net revenues in the second semester of 2020. As result, R$2,361 of net revenue were deferred to the first semester of 2021 and recorded in advances from customers.