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16 Equity (Details Narrative)
R$ / shares in Units, R$ in Thousands
 1 Months Ended 12 Months Ended
Jan. 31, 2021
R$ / shares
shares
Jun. 18, 2019
BRL (R$)
shares
Mar. 29, 2019
BRL (R$)
shares
Mar. 12, 2019
BRL (R$)
Mar. 08, 2019
BRL (R$)
Dec. 04, 2018
BRL (R$)
shares
Aug. 31, 2018
BRL (R$)
shares
Apr. 26, 2018
BRL (R$)
shares
Jun. 30, 2019
BRL (R$)
shares
Dec. 31, 2020
BRL (R$)
shares
Dec. 23, 2020
shares
Jul. 20, 2020
BRL (R$)
Dec. 31, 2019
BRL (R$)
shares
Jul. 23, 2019
shares
Jun. 13, 2019
BRL (R$)
Mar. 12, 2019
$ / shares
shares
Mar. 08, 2019
$ / shares
shares
Dec. 31, 2018
BRL (R$)
shares
Share capital                   R$ 17     R$ 17         R$ 315,000
Total number of shares | shares                   93,146,731     89,744,275         1,443,541
Additional paid-in capital                   R$ 2,323,488   R$ 17,531 R$ 1,931,047          
Capital increase with earnings reserves                                   R$ 80,541
Renounce of dividends for prior years         R$ 4,107                          
Cancellation of dividend         R$ 4,107                          
Dividend payables                   12,984         R$ 38,000      
Uniao educacional do planalto central s.a. ("UEPC") [member]                                    
Proceeds from issue of ordinary shares   R$ 36,358 R$ 137,051                              
Centro De Ciencias Em Saude De Itajuba S.A. ("CCSI") [Member]                                    
Dividend payables                   4,592                
IESVAP [member]                                    
Dividend payables                   R$ 8,392                
Class A Ordinary Shares [Member]                                    
Total number of shares | shares                   45,112,416     31,814,690          
Proceeds from issue of ordinary shares                   R$ 3,260,480                
Additional paid-in capital                       R$ 141,976            
Repurchase of ordinary shares | shares                     1,015,844              
Class A Ordinary Shares [Member] | Events After Reporting Periods [Member]                                    
Repurchase of ordinary shares | shares 521,117                                  
Weighted average price | R$ / shares R$ 124.15                                  
Class A Ordinary Shares [Member] | Events After Reporting Periods [Member] | USD                                    
Weighted average price | R$ / shares R$ 22.51                                  
Ordinary Shares [Member]                                    
Total number of shares | shares           137,298   124,994                   1,411,895
Proceeds from issue of ordinary shares           R$ 99,999   R$ 55,000                    
Ordinary Shares [Member] | Nicolau Carvalho Esteves [Member]                                    
Repurchase of ordinary shares | shares                               160,000    
Acquisition price | $ / shares                               $ 206.25    
Acquisitions held by shareholders       R$ 33,001                            
Ordinary Shares [Member] | Uniao educacional do planalto central s.a. ("UEPC") [member]                                    
Proceeds from issue of ordinary shares   R$ 24,458                                
Number of shares in entity held by entity or by its subsidiaries or associates | shares   27,211                                
Ordinary Shares [Member] | BR Health Participacoes S.A. ("BR Health") And Guardaya Empreendimentos and Participacoes S.A. ("Guardaya") [Member]                                    
Proceeds from issue of ordinary shares     R$ 122,062                              
Number of shares in entity held by entity or by its subsidiaries or associates | shares     378,696                              
Ordinary Shares [Member] | BR Health Participacoes S.A. ("BR Health") [Member]                                    
Proceeds from issue of ordinary shares       R$ 150,000                            
Number of shares in entity held by entity or by its subsidiaries or associates | shares                               156,337 37,200  
Par value per share | $ / shares                                 $ 0.01  
Ordinary Shares [Member] | FASA, IESP And Univaco [Member]                                    
Proceeds from issue of ordinary shares                 R$ 24,310                  
Number of shares in entity held by entity or by its subsidiaries or associates | shares                 157,202                  
Class B Preferred Shares [Member]                                    
Total number of shares | shares             5,123                     5,123
Description of ratio of convertible shares                   Class B preferred shares were convertible into common shares at the ratio of 1 Class B preferred share for 1 common share, in certain situations.                
Proceeds from issue of preference shares             R$ 1,304                      
Class A Preferred Shares [Member]                                    
Total number of shares | shares               26,523                   26,523
Description of ratio of convertible shares                   Convertible into common shares at the ratio of 1 preferred share for 17.7 common shares in the situations described in the Shareholders Agreement.                
Proceeds from issue of preference shares               R$ 11,670                    
Class B Ordinary Shares [Member]                                    
Total number of shares | shares                   48,034,315     57,929,585          
Class A common shares [member]                                    
Total number of shares | shares                           13,888,887