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Stockholders Equity and Stock Options - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Stockholders' Equity Note [Abstract]
Number of shares, Outstanding	6,436,387
Number of shares, Options granted	2,417,137
Number of shares, Options forfeited/expired	(245,183)
Number of shares, Outstanding	8,608,341	6,436,387
Number of shares, Exercisable as of September 30, 2025	4,332,406
Number of shares, Vested and expected to vest as of September 30, 2025	8,608,341
Weighted average exercise price, balance	$ 7.78
Weighted average exercise price, Options granted	3.33
Weighted average exercise price, Options forfeited/expired	8.49
Weighted average exercise price, balance	6.51	$ 7.78
Weighted average exercise price, Exercisable as of September 30, 2025	8.82
Weighted average exercise price, Vested and expected to vest as of September 30, 2025	$ 6.51
Weighted average remaining contractual term, outstanding	7 years 6 months	7 years 7 months 6 days
Weighted average remaining contractual term, Exercisable as of September 30, 2025	6 years 3 months 18 days
Weighted average remaining contractual term, Vested and expected to vest as of September 30, 2025	7 years 6 months
Aggregate intrinsic value, outstanding	$ 0.4
Aggregate intrinsic value, exercisable as of September 30, 2025	0.1
Aggregate intrinsic value, Vested and expected to vest as of September 30, 2025	$ 0.4

X

- 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.

+ References

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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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For presentations that combine terminations, 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 or that expired.

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Weighted average price of options that were either forfeited or expired.

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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 options outstanding. 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 exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. 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 per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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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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