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Stock-Based Compensation - Schedule of Stock Option Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares
Number of shares
Options outstanding at beginning of period (in shares) | shares	3,305
Options granted (in shares) | shares	537
Options exercised (in shares) | shares	(419)
Options forfeited and cancelled (in shares) | shares	(155)
Options outstanding at end of period (in shares) | shares	3,268	3,305
Options vested and exercisable (in shares) | shares	1,969
Weighted-average exercise price per share
Weighted-average exercise price of options outstanding at beginning of period (in USD per share) | $ / shares	$ 3.86
Weighted-average exercise price of options granted (in USD per share) | $ / shares	18.70
Weighted-average exercise price of options exercised (in USD per share) | $ / shares	2.00
Weighted-average exercise price of options forfeited and cancelled (in USD per share) | $ / shares	4.73
Weighted-average exercise price of options outstanding at end of period (in USD per share) | $ / shares	6.49	$ 3.86
Weighted-average exercise price of options vested and exercisable (in USD per share) | $ / shares	$ 2.99
Weighted-average remaining contractual life of options outstanding (in years)	7 years 2 months 19 days	7 years 2 months 15 days
Weighted-average remaining contractual life of options vested and exercisable (in years)	6 years 2 months 19 days
Aggregate intrinsic value of options outstanding | $	$ 83,369	$ 22,952
Aggregate intrinsic value of options vested and exercisable | $	$ 57,141

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- Definition

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

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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

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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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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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