Share-Based Compensation - Summary of Options Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options, Outstanding beginning balance	29,676,253
Number of options, Granted	5,601,640
Number of options, Exercised	(5,622,274)
Number of options, Forfeited	(1,410,996)
Number of options, Outstanding ending balance	28,244,623	29,676,253
Number of options, Exercisable	16,636,567
Weighted average exercise price per option, Outstanding beginning balance	$ 0.0157
Weighted average exercise price per option, Granted	0.0002
Weighted average exercise price per option, Exercised	0.0039
Weighted average exercise price per option, Forfeited	0.0011
Weighted average exercise price per option, Outstanding ending balance	0.0157	$ 0.0157
Weighted average exercise price per option, Exercisable	$ 0.0265
Weighted average remaining contractual term options outstanding	6 years 4 months 24 days	6 years 8 months 8 days
Weighted average remaining contractual life, Exercisable	4 years 9 months 10 days
Aggregated intrinsic value, Outstanding beginning balance	$ 126,375	$ 132,783
Aggregated intrinsic value, Exercisable	$ 74,260
Options classified as Equity Awards \| 2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options, Outstanding beginning balance	4,848,671
Number of options, Granted	926,300
Number of options, Repurchased	(769,889)
Number of options, Forfeited	(384,066)
Number of options, Outstanding ending balance	4,621,016	4,848,671
Number of options, Exercisable	3,002,020
Weighted average exercise price per option, Outstanding beginning balance	$ 1.6232
Weighted average exercise price per option, Granted	$ 0.0001
Weighted average exercise price per option, Repurchased	1.0237
Weighted average exercise price per option, Forfeited	$ 0.865
Weighted average exercise price per option, Outstanding ending balance	1.4607	$ 1.6232
Weighted average exercise price per option, Exercisable	$ 2.1096
Weighted average remaining contractual term options outstanding	6 years 6 months 29 days	6 years 9 months 3 days
Weighted average remaining contractual life, Exercisable	5 years 2 months 12 days
Aggregated intrinsic value, Outstanding beginning balance	$ 0	$ 0
Aggregated intrinsic value, Exercisable	$ 0

Share based compensation arrangement by share based payment award options repurchased in period.

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Share based compensation arrangements by share based payment award options repurchased in period weighted average exercise price.

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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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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 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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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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