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Accounts payable and accrued liabilities (Tables)
12 Months Ended
Dec. 31, 2017
Trade And Other Current Payables [Abstract]  
Schedule of payable and accrued liabilities
20172016
Trade payables$177,040$213,481
Non-trade payables75,78485,632
Payables due to related parties5,58113,787
Total$258,405$312,900