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18. SHARE-BASED PAYMENT (Details 1)
 12 Months Ended
Dec. 31, 2020
R$ / shares
shares
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Shares granted 7,767,384
Outstanding shares 5,453,018
Fair value of the shares | R$ / shares R$ 4.84
Restricted stock plan due october 1, 2018 [member]  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Grant date 10.01.18
Vesting period Oct. 01, 2021
Shares granted 2,311,394
Outstanding shares 876,120
Fair value of the shares | R$ / shares R$ 21.44
Restricted stock plan due july 01, 2019 [member]  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Grant date 07.01.19
Vesting period Jul. 01, 2022
Shares granted 1,815,649
Outstanding shares 1,071,515
Fair value of the shares | R$ / shares R$ 30.61
Restricted stock plan due september 16, 2019 [member]  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Grant date 09.16.19
Vesting period Oct. 01, 2022
Shares granted 68,605
Outstanding shares 45,736
Fair value of the shares | R$ / shares R$ 30.61
Restricted stock plan due june 01, 2020 [member]  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Grant date 06.01.20
Vesting period Jun. 01, 2023
Shares granted 3,571,736
Outstanding shares 3,459,647
Fair value of the shares | R$ / shares R$ 21.28