Equity Incentive Plans and ESPP - Schedule of Stock Option Plan (Details)	6 Months Ended
	Jun. 30, 2020 $ / shares shares
Number of options
Number of options, beginning outstanding (in shares) | shares	10,350,810
Number of options, granted (in shares) | shares	748,247
Number of options, exercised (in shares) | shares	(583,753)
Number of options, forfeited and canceled (in shares) | shares	(172,913)
Number of options, ending outstanding (in shares) | shares	10,342,391
Number of options, exercisable options (in shares) | shares	5,360,242
Weighted average exercise price
Weighted average exercise price, beginning outstanding (in usd per share) | $ / shares	$ 20.40
Weighted average exercise price, granted (in usd per share) | $ / shares	68.99
Weighted average exercise price, exercised (in usd per share) | $ / shares	14.06
Weighted average exercise price, forfeited and canceled (in usd per share) | $ / shares	18.40
Weighted average exercise price, ending outstanding (in usd per share) | $ / shares	24.30
Weighted average exercise price, exercisable options (in usd per share) | $ / shares	$ 16.08