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Stock-based Compensation - Schedule of Stock Options Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Number of Options
Beginning Balance (in shares)	15,235
Granted (in shares)	971
Exercised (in shares)	(831)
Cancelled/forfeited (in shares)	(101)
Ending Balance (in shares)	15,274	15,235
Vested and expected to vest at end of period (in shares)	15,253
Exercisable at end of period (in shares)	7,074
Weighted- Average Exercise Price
Beginning Balance (in dollars per share)	$ 8.78
Granted (in dollars per share)	28.00
Exercised (in dollars per share)	0.65
Cancelled/forfeited (in dollars per share)	4.24
Ending Balance (in dollars per share)	10.47	$ 8.78
Vested and expected to vest at end of period (in dollars per share)	10.48
Exercisable at end of period (in dollars per share)	$ 8.79
Weighted- Average Remaining Contractual Life (in Years)	8 years	8 years 8 months 12 days
Vested and expected to vest at end of period, term	8 years
Exercisable at end of period, term	7 years 7 months 6 days
Aggregate Intrinsic Value	$ 97,094	$ 15,873
Vested and expected to vest at end of period	96,889
Exercisable at ending period	$ 51,533

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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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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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

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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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