ACCOUNTS PAYABLE AND ACCRUED LIABILITIES

12 Months Ended

Dec. 31, 2017

ACCOUNTS PAYABLE AND ACCRUED LIABILITIES

ACCOUNTS PAYABLE AND ACCRUED LIABILITIES

13.        ACCOUNTS PAYABLE AND ACCRUED LIABILITIES

	December 31, 2017		December 31, 2016		December 31, 2015
Trade payables	$	1,256,795	$	943,922	$	2,515,815
Accrued vacation		157,198		217,036		167,604
Accrued liabilities		346,984		1,270,306		221,167
Tax liability		—		—		155,169
Other accounts payable		83,978		59,679		173,216
	$	1,844,955	$	2,490,943	$	3,232,971