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Business combinations (Details Text) - BRL (R$)
12 Months Ended
Aug. 12, 2021
Oct. 31, 2020
Aug. 31, 2020
Jul. 23, 2020
Dec. 31, 2021
Dec. 31, 2020
Sep. 30, 2021
Jul. 31, 2021
Mar. 08, 2021
Zygo                  
Business combinations (Details Text) [Abstract]                  
Ownership  interest acquired       100.00%          
Consideration paid (received)       R$ 8,000,000          
Value of net assets       1,883,000          
Goodwill               R$ 5,769,000  
Cash transferred       5,053,000          
Goodwill recognised as of acquisition date       R$ 6,117,000          
Zygo | Bottom of range                  
Business combinations (Details Text) [Abstract]                  
Consideration transferrable, term       3 years          
Zygo | Top of range                  
Business combinations (Details Text) [Abstract]                  
Consideration transferrable, term       5 years          
Zygo | Non-Compete Agreement and Software                  
Business combinations (Details Text) [Abstract]                  
Intangible assets               R$ 348,000  
CDS                  
Business combinations (Details Text) [Abstract]                  
Ownership  interest acquired     100.00%   99.99% 99.99%      
Value of net assets     R$ 2,379,000            
Goodwill     0            
Cash transferred     R$ 2,379,000            
Moip                  
Business combinations (Details Text) [Abstract]                  
Ownership  interest acquired   100.00%     100.00% 100.00%      
Consideration paid (received)   R$ 358,609,000              
Value of net assets   151,986,000              
Cash transferred   307,855,000             R$ 32,573,000
Consideration transferrable, term       5 years          
Liabilities incurred   R$ 18,181,000              
Goodwill recognised as of acquisition date           R$ 148,117,000      
Moip | Bottom of range                  
Business combinations (Details Text) [Abstract]                  
Estimated GDP growth rate           0.057      
Estimated discount rate based on WACC           0.117      
Moip | Top of range                  
Business combinations (Details Text) [Abstract]                  
Estimated GDP growth rate           0.063      
Estimated discount rate based on WACC           0.133      
Moip | Customer-related intangible assets [member]                  
Business combinations (Details Text) [Abstract]                  
Intangible assets           R$ 58,506,000      
Concil                  
Business combinations (Details Text) [Abstract]                  
Ownership  interest acquired 100.00%       100.00%        
Consideration paid (received) R$ 43,896,000                
Value of net assets 23,165,000                
Goodwill             R$ 20,731,000    
Cash transferred 35,000,000                
Liabilities incurred R$ 8,896,000                
Contingent liabilities recognised as of acquisition date             7,848,000    
Concil | Bottom of range                  
Business combinations (Details Text) [Abstract]                  
Estimated GDP growth rate         0.020        
Estimated discount rate based on WACC         0.175        
Concil | Top of range                  
Business combinations (Details Text) [Abstract]                  
Estimated GDP growth rate         0.045        
Estimated discount rate based on WACC         0.195        
Concil | Customer-related intangible assets [member]                  
Business combinations (Details Text) [Abstract]                  
Intangible assets             3,839,000    
Concil | Non-compete Agreements [Member]                  
Business combinations (Details Text) [Abstract]                  
Intangible assets             940,000    
Concil | Computer software [member]                  
Business combinations (Details Text) [Abstract]                  
Intangible assets             R$ 33,136,000