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Accounts receivable (Tables) | 12 Months Ended
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Dec. 31, 2018
Trade And Other Receivables [Abstract] |
Schedule of accounts receivable |
|  | 2018 | 2017
Trade receivables | $ | 392,865 | $ | 392,759
GST/VAT receivables |  | 3,711 |  | 3,611
Other receivables |  | 5,774 |  | 454
Total | $ | 402,350 | $ | 396,824

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