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5 TRADE RECEIVABLES (Tables) | 12 Months Ended
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Dec. 31, 2019
Trade and other receivables [abstract] |
Schedule of trade receivables |
|  |  | Consolidated
| 12/31/2019 |  | 12/31/2018
Trade receivables |  |  |
Third parties |  |  |
Domestic market | 1,118,632 |  | 1,369,396
Foreign market | 1,003,905 |  | 852,821
| 2,122,537 |  | 2,222,217
Allowance for doubtful debts | (245,194) |  | (237,352)
| 1,877,343 |  | 1,984,865
Related Parties (note 18 b) | 170,588 |  | 93,317
| 2,047,931 |  | 2,078,182
Schedule of gross trade receivables from third parties | The breakdown of gross trade receivables from third parties is as follows:
|  |  | Consolidated
| 12/31/2019 |  | 12/31/2018
Current | 1,739,746 |  | 1,514,847
Past-due up to 30 days | 132,845 |  | 177,287
Past-due up to 180 days | 23,877 |  | 47,684
Past-due over 180 days | 226,069 |  | 482,399
| 2,122,537 |  | 2,222,217
Schedule of allowance for doubtful debts | The movements in the Group’s allowance for doubtful debts are as follows
| Consolidated
| 12/31/2019 |  | 12/31/2018
Opening balance | (237,352) |  | (191,979)
Expected credit losses | (43,313) |  | (53,706)
Recovery of receivables | 35,471 |  | 8,333
Closing balance | (245,194) |  | (237,352)

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