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Share-Based Compensation - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Aug. 31, 2020	Jun. 16, 2020	Jun. 25, 2019	Jun. 22, 2018
Share based options contractual terms	7 years 7 months 2 days
Weighted average grant date fair value of the share options	$ 9.45	$ 4.78	$ 2.96
Total unrecognized compensation expense	$ 40,932,534
Weighted average period for un recognized compensation costs to be recognized	11 months 8 days
Share based options granted	863,000
Share-based Payment Arrangement, Expense	$ 43,939,447	$ 60,805,483
Technology And Product Development Expenses [Member]
Share-based Payment Arrangement, Expense	807,418	$ 1,015,858
IPO [Member]
Share-based Payment Arrangement, Expense	$ 46,458,472
Twenty Twenty equity incentive plan [Member]
Common stock reserved for future issuance				2,878,602
Employee award vesting rights percentage	25.00%
Employee award vesting requisite service period	4 years
Percentage of Ordinary Shares issued and outstanding	2.00%
Share based options granted	863,000
Share Based Compensation Arrangement By Sharebased Payment Award Vesting Stock Options On Pro Rata Basis	3 years
Twenty Eighteen Share Incentive Plan [Member]
Common stock reserved for future issuance					15,000,000	15,000,000	11,733,506
Employee award vesting rights percentage	25.00%
Employee award vesting requisite service period	4 years

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Aggregate number of common shares reserved for future issuance.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Percentage of vesting of award under share-based payment arrangement.

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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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Reserved percentage of ordinary shares issued and outstanding.

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