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Trade receivables (Tables) | 12 Months Ended
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Dec. 31, 2018
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Summary of Trade Receivables | Trade receivables are analysed as follows:
|  | 31/12/18 |  |  | 31/12/17 |  |  | 01/01/17 |
Domestic customers |  |  | 20,247 |  |  |  | 22,399 |  |  |  | 22,332 |
European Customers |  |  | 7,815 |  |  |  | 9,232 |  |  |  | 12,652 |
Chinese customers |  |  | 7,233 |  |  |  | 618 |  |  |  | 374 |
North American customers |  |  | 3,573 |  |  |  | 4,374 |  |  |  | 2,562 |
Other foreign customers |  |  | 11,726 |  |  |  | 11,701 |  |  |  | 11,762 |
Total trade receivables |  |  | 50,594 |  |  |  | 48,324 |  |  |  | 49,682 |
Allowance for doubtful accounts |  |  | (9,627 | ) |  |  | (10,775 | ) |  |  | (9,544 | )
Total trade receivables |  |  | 40,967 |  |  |  | 37,549 |  |  |  | 40,138 |
Summary of Trade Receivables and Revenue | As at December 31, 2018 and 2017 and for each year of the two-year period ended December 31, 2018, the Company had customers who exceeded 5% of trade receivables as follows:
Trade receivables |  | No. of customers |  | % of trade receivables
2018 |  | 2 |  | 21%
2017 |  | 3 |  | 18%
Summary of Provision for Doubtful Accounts | The following table provides the movements in the allowance for doubtful accounts.
|  | 31/12/18 |  |  | 31/12/17 |
Balance, beginning of year |  |  | 10,775 |  |  |  | 9,544 |
Effect of the adoption of IFRS 9 (see note 5) |  |  | 37 |  |  |  | — |
Charges – bad debt expense |  |  | 745 |  |  |  | 1,475 |
Reductions – write off of uncollectible amounts |  |  | (1,930 | ) |  |  | (244 | )
Balance, end of year |  |  | 9,627 |  |  |  | 10,775 |
Summary of Trade Receivables Denominated in Foreign Currencies | Trade receivables denominated in foreign currencies as at December 31, 2018, 2017 and January 1, 2017 totaled 26,490, 16,991 and 18,145, respectively. These receivables consist of the following:
|  | 31/12/18 |  |  | 31/12/17 |  |  | 01/01/17 |
Chinese Yuan |  |  | 7,233 |  |  |  | 618 |  |  |  | 374 |
Brasilian Reais |  |  | 5,893 |  |  |  | 4,620 |  |  |  | 4,461 |
British pounds |  |  | 2,823 |  |  |  | 3,215 |  |  |  | 5,298 |
U.S. dollars |  |  | 2,183 |  |  |  | 3,736 |  |  |  | 5,694 |
Canadian dollars |  |  | 2,124 |  |  |  | 2,232 |  |  |  | 466 |
Other currencies |  |  | 6,234 |  |  |  | 2,570 |  |  |  | 1,852 |
Balance, end of year |  |  | 26,490 |  |  |  | 16,991 |  |  |  | 18,145 |

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- Definition The disclosure of the reconciliation of changes in the loss allowance and explanation of changes in the gross carrying amount for financial instruments. Loss allowance is the allowance for expected credit losses on financial assets measured in accordance with paragraph 4.1.2 of IFRS 9, lease receivables and contract assets, the accumulated impairment amount for financial assets measured in accordance with paragraph 4.1.2A of IFRS 9 and the provision for expected credit losses on loan commitments and financial guarantee contracts. [Refer: Gross carrying amount [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 35H -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_35H&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 35I -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_35I&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition Disclosure of customers who exceeded five percentage of trade receivables and revenue. + References No definition available. + Details
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