Accounts payable and accrued liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Payables and Accruals [Abstract]

Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]

	December 31, 2017		December 31, 2016
Trade accounts payable	$	4,007	$	3,924
Employee-related accruals		2,310		2,637
Interest payable on deferred consideration (note 12)		-		24
Other accrued liabilities		1,384		1,436
	$	7,701	$	8,021