Contingent consideration (Tables)

12 Months Ended

Dec. 31, 2017

Contingent Consideration [Abstract]

Disclosure of contingent liabilities

At December 31, 2017, if all of the remaining milestones are met, the timing of these payments is estimated to occur as follows:

	$
2018	100
2020	2,625
2021	5,125
	7,850