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18 Revenue (Details 1) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
RevenueLineItems [Line Items]      
Types of services or goods R$ 1,201,191 R$ 750,630  
Tuition fees [1] 1,388,735 856,561 R$ 385,784
Other 99,817 43,116 4,414
Timing of revenue recognition 1,201,191 750,630  
Transferred over time 1,128,558 713,827 331,045
Transferred at a point in time 72,633 36,803 R$ 2,890
Business Unit 1 [member]      
RevenueLineItems [Line Items]      
Types of services or goods 1,002,461 653,760  
Tuition fees 997,055 648,957  
Other 5,406 4,803  
Timing of revenue recognition 1,002,461 653,760  
Transferred over time 997,055 648,957  
Transferred at a point in time 5,406 4,803  
Business Unit 2 [member]      
RevenueLineItems [Line Items]      
Types of services or goods 200,349 100,750  
Tuition fees 107,197 60,195  
Other 93,152 40,555  
Timing of revenue recognition 200,349 100,750  
Transferred over time 131,503 64,870  
Transferred at a point in time 68,846 35,880  
Elimination Inter-Segment Transactions [member]      
RevenueLineItems [Line Items]      
Types of services or goods (1,619) (3,880)  
Tuition fees  
Other (1,619) (3,880)  
Timing of revenue recognition (1,619) (3,880)  
Transferred over time  
Transferred at a point in time R$ (1,619) R$ (3,880)  
[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 it's 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.