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4 Segment information (Details Narrative)
R$ in Thousands
 12 Months Ended
Dec. 31, 2020
Number
Dec. 31, 2019
BRL (R$)
Disclosure of operating segments [line items]    
Number of reportable segments | Number 2  
IPEC Licenses [Member]    
Disclosure of operating segments [line items]    
Capital expense on acquisitions of property and equipment   R$ 108,000
Capital expense on acquisitions of intangible assets   R$ 54,000