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Stock Based Compensation - Summary of Stock Option Activity (Detail) - $ / shares	9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Number of Shares Underlying Outstanding Options
Number of Shares Underlying Outstanding Options, Beginning Balance	18,280,548
Number of Shares Underlying Outstanding Options, Options granted	680,732	0
Number of Shares Underlying Outstanding Options, Options exercised	(406,577)
Number of Shares Underlying Outstanding Options, Options forfeited and cancelled	(9,083)
Number of Shares Underlying Outstanding Options, Ending Balance	18,545,620		18,280,548
Number of Shares Underlying Outstanding Options, Exercisable- June 30, 2024	17,867,835
Weighted- Average Exercise Price
Weighted- Average Exercise Price, Beginning Balance	$ 1.49
Weighted- Average Exercise Price, Options granted	10
Weighted- Average Exercise Price, Options Exercised	3.21
Weighted- Average Exercise Price, Options forfeited and cancelled	16.24
Weighted- Average Exercise Price, Ending Balance	1.74		$ 1.49
Weighted- Average Exercise Price, Exercisable - June 30, 2024	$ 0.7
Weighted-Average Remaining Contractual Term (Years)
Weighted-Average Remaining Contractual Term (Years), Outstanding Balance	6 years 8 months 12 days		6 years 10 months 24 days
Weighted Average Remaining Contractual Term, Exercisable - June 30, 2024	6 years 7 months 6 days

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

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