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Segment Reporting (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Segment Reporting      
Net revenue from sales and services R$ 1,264,280 R$ 947,419 R$ 997,628
Cost of goods sold and services (473,135) (396,829) (378,003)
Operating income (expenses)      
General and administrative expenses (471,626) (430,279) (406,352)
Commercial expenses (194,043) (164,439) (165,169)
Other operating income, net 1,020 5,554 4,283
Impairment losses on trade receivables (45,904) (32,726) (25,015)
Share of loss equity-accounted investees (4,512)    
Profit (loss) before finance result and taxes 76,080 (71,300) 27,372
Assets 7,520,591 7,333,407 6,978,270
Current and non-current liabilities 2,890,911 2,668,198 2,192,953
Content & EdTech Platform      
Segment Reporting      
Net revenue from sales and services 1,155,345 850,713 908,406
Cost of goods sold and services (375,167) (327,651) (301,882)
Operating income (expenses)      
General and administrative expenses (445,330) (413,746) (387,023)
Commercial expenses (183,118) (147,664) (152,659)
Other operating income, net 2,260 5,469 4,283
Impairment losses on trade receivables (45,769) (32,344) (25,015)
Share of loss equity-accounted investees (4,512)    
Profit (loss) before finance result and taxes 103,709 (65,223) 46,110
Assets 7,438,094 7,207,084 6,848,198
Current and non-current liabilities 2,852,390 2,605,351 2,141,107
Digital Services Platform      
Segment Reporting      
Net revenue from sales and services 108,935 96,706 89,222
Cost of goods sold and services (97,968) (69,178) (76,121)
Operating income (expenses)      
General and administrative expenses (26,295) (16,533) (19,329)
Commercial expenses (10,926) (16,775) (12,510)
Other operating income, net (1,240) 85 0
Impairment losses on trade receivables (135) (382) 0
Share of loss equity-accounted investees 0    
Profit (loss) before finance result and taxes (27,629) (6,077) (18,738)
Assets 82,497 126,323 130,072
Current and non-current liabilities R$ 38,521 R$ 62,847 R$ 51,847