Stockholders' Equity - Summary of Stock Option Activity (Detail) - $ / shares	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Weighted Average Exercise Price
Ending balance (in dollars per share)	$ 0.18		$ 0.18
Options to purchase common stock
Outstanding Options
Beginning balance (in shares)	7,775,437	7,892,857	7,892,857
Granted (in shares)	0	0
Exercised (in shares)	(827,296)	(117,420)
Forfeited / canceled (in shares)	(9,569)	0
Ending balance (in shares)	6,938,572	7,775,437	6,938,572	7,892,857
Vested and expected to vest (in shares)	6,938,572		6,938,572
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 0.19	$ 0.19	$ 0.19
Granted (in dollars per share)	0	0
Exercised (in dollars per share)	0.28	0.29
Forfeited / canceled (in dollars per share)	0.63	0
Ending balance (in dollars per share)	$ 0.18	$ 0.19	$ 0.18	$ 0.19
Weighted Average Remaining Contractual Life (in years)
Weighted Average Remaining Contractual Life (in years)	7 years 7 months 17 days	7 years 1 month 28 days		7 years 3 months 21 days

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

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