Equity Incentive Plans and ESPP - Schedule of Stock Option Plan (Details)	9 Months Ended
Sep. 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	861,551
Number of options, exercised (in shares) \| shares	(1,260,709)
Number of options, forfeited and canceled (in shares) \| shares	(183,758)
Number of options, ending outstanding (in shares) \| shares	9,767,894
Number of options, exercisable options (in shares) \| shares	4,858,926
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	70.56
Weighted average exercise price, exercised (in usd per share) \| $ / shares	14.16
Weighted average exercise price, forfeited and canceled (in usd per share) \| $ / shares	19.26
Weighted average exercise price, ending outstanding (in usd per share) \| $ / shares	25.65
Weighted average exercise price, exercisable options (in usd per share) \| $ / shares	$ 16.84

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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