Share Capital - Schedule of Stock Option Outstanding (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Number of options outstanding	14,806,027	11,377,354
Options outstanding, weighted average remaining contractual term	7 years 2 months 12 days
Number of options exercisable	6,389,813
Options exercisable, weighted average remaining contractual term	5 years 2 months 16 days
Exercise price 0.23 - 1.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Number of options outstanding	338,906
Options outstanding, weighted average remaining contractual term	1 year 11 months 12 days
Number of options exercisable	338,906
Options exercisable, weighted average remaining contractual term	1 year 11 months 12 days
Exercise price 0.23 - 1.00 | Minimum
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise price	$ 0.23
Exercise price 0.23 - 1.00 | Maximum
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise price	$ 1.00
Exercise price 1.01 - 7.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Number of options outstanding	2,627,476
Options outstanding, weighted average remaining contractual term	4 years 3 months 15 days
Number of options exercisable	2,491,388
Options exercisable, weighted average remaining contractual term	4 years 18 days
Exercise price 1.01 - 7.00 | Minimum
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise price	$ 1.01
Exercise price 1.01 - 7.00 | Maximum
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise price	$ 7.00
Exercise price 7.01 - 11.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Number of options outstanding	4,395,057
Options outstanding, weighted average remaining contractual term	7 years 6 months 21 days
Number of options exercisable	1,589,345
Options exercisable, weighted average remaining contractual term	5 years 2 months 12 days
Exercise price 7.01 - 11.00 | Minimum
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise price	$ 7.01
Exercise price 7.01 - 11.00 | Maximum
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise price	$ 11.00
Exercise price 11.01 - 16.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Number of options outstanding	5,260,210
Options outstanding, weighted average remaining contractual term	8 years 2 months 16 days
Number of options exercisable	1,305,796
Options exercisable, weighted average remaining contractual term	6 years 11 months 8 days
Exercise price 11.01 - 16.00 | Minimum
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise price	$ 11.01
Exercise price 11.01 - 16.00 | Maximum
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise price	$ 16.00
Exercise price 16.01 - 20.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Number of options outstanding	351,750
Options outstanding, weighted average remaining contractual term	9 years 6 months 25 days
Exercise price 16.01 - 20.00 | Minimum
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise price	$ 16.01
Exercise price 16.01 - 20.00 | Maximum
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise price	$ 20.00
Exercise price 20.01 - 27.50
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Number of options outstanding	1,832,628
Options outstanding, weighted average remaining contractual term	8 years 1 month 24 days
Number of options exercisable	664,378
Options exercisable, weighted average remaining contractual term	7 years 9 months 29 days
Exercise price 20.01 - 27.50 | Minimum
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise price	$ 20.01
Exercise price 20.01 - 27.50 | Maximum
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise price	$ 27.50