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23. SHAREHOLDERS' EQUITY (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure of classes of share capital [abstract] |
Schedule of ownership structure | As of December 31, 2020, the Company’s ownership structure was as follows :
|  |  |  |  |  | 12/31/2020 |  |  |  |  |  | 12/31/2019
|  | Number of common shares |  | % of total shares |  | % of voting capital |  | Number of common shares |  | % of total shares |  | % of voting capital
Vicunha Aços S.A. (*) |  | 679,522,254 |  | 48.97% |  | 49.24% |  | 679,522,254 |  | 48.97% |  | 49.24%
Rio Iaco Participações S.A. (*) |  | 58,193,503 |  | 4.19% |  | 4.22% |  | 58,193,503 |  | 4.19% |  | 4.22%
NYSE (ADRs) |  | 248,763,533 |  | 17.93% |  | 18.02% |  | 262,206,103 |  | 18.90% |  | 19.00%
Other shareholders |  | 393,635,257 |  | 28.37% |  | 28.52% |  | 380,192,687 |  | 27.40% |  | 27.55%
Outstanding shares |  | 1,380,114,547 |  | 99.47% |  | 100.00% |  | 1,380,114,547 |  | 99.47% |  | 100.00%
Treasury shares |  | 7,409,500 |  | 0.53% |  |  |  | 7,409,500 |  | 0.53% |  |
Total shares |  | 1,387,524,047 |  | 100.00% |  |  |  | 1,387,524,047 |  | 100.00% |  |
(*) Controlling group companies.
Schedule of share buyback programs | As of December 31, 2020, the position of treasury shares was as follows:
Program |  | Board’s Authorization |  | Authorized quantity |  | Program period |  | Average buyback price |  | Minimum and maximum buyback price |  | Sale of shares |  | Balance in treasury
|  | 04/20/2018 |  | 30,391,000 |  | From 4/20/2018 to 4/30/2018 |  | Not applicable |  | Not applicable |  | 22,981,500 |  | 7,409,500
Schedule of position of treasury shares | As of December 31, 2020, the position of treasury shares was as follows:
Quantity purchased (in units) |  | Amount paid for the shares |  | Share price |  | Share market price as of 12/31/2020 (*)
|  | Minimum |  | Maximum |  | Average |
7,409,500 |  | R$ 58,264 |  | R$ 4.48 |  | R$ 10.07 |  | R$ 7.86 |  | R$ 235,993
(*) The average share price on December 31, 2020 was used in the amount of R$31.85 per share.
Schedule of basic earnings (loss) per share | The earnings per share are shown below:
| 12/31/2020 |  | 12/31/2019 |  | 12/31/2018
| Common Shares |  |
Profit for the year | 3,794,295 |  | 1,789,067 |  | 5,074,136
Weighted average number of shares | 1,380,114,547 |  | 1,380,114,547 |  | 1,373,250,595
Basic and diluted earnings (loss) per share | 2.74926 |  | 1.29632 |  | 3.69498

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