Equity Incentive Plans - Schedule of Stock Option Plan (Details)	3 Months Ended
	Mar. 31, 2018 $ / shares shares
Number of options
Number of options, Outstanding at beginning of year | shares	14,806,027
Number of options, Granted | shares	1,904,634
Number of options, Exercised | shares	(500,166)
Number of options, Forfeited and cancelled | shares	(71,307)
Number of options, Outstanding at ending of year | shares	16,139,188
Number of options, Exercisable options | shares	7,375,692
Weighted average exercise price
Weighted average exercise price, Outstanding at beginning of year | $ / shares	$ 10.64
Weighted average exercise price, Granted | $ / shares	21.15
Weighted average exercise price, Exercised | $ / shares	5.27
Weighted average exercise price, Forfeited and cancelled | $ / shares	11.86
Weighted average exercise price, Outstanding at end of year | $ / shares	12.04
Weighted average exercise price, Exercisable options | $ / shares	$ 9.31