Equity Incentive Plans - Schedule of Stock Option Plan (Details)	9 Months Ended
	Sep. 30, 2017 $ / shares shares
Number of options
Number of options, Outstanding at beginning of year | shares	11,377,354
Number of options, Granted | shares	5,117,088
Number of options, Exercised | shares	(1,370,810)
Number of options, Forfeited and cancelled | shares	(310,693)
Number of options, Outstanding at ending of year | shares	14,812,939
Number of options, Exercisable options | shares	6,119,710
Number of options, Vested and expected to vest | shares	14,812,939
Weighted average exercise price
Weighted average exercise price, Outstanding at beginning of year | $ / shares	$ 9.76
Weighted average exercise price, Granted | $ / shares	9.96
Weighted average exercise price, Exercised | $ / shares	2.31
Weighted average exercise price, Forfeited and cancelled | $ / shares	12.39
Weighted average exercise price, Outstanding at end of year | $ / shares	10.46
Weighted average exercise price, Exercisable options | $ / shares	8.17
Weighted average exercise price, Vested and expected to vest | $ / shares	$ 10.46