Equity Incentive Plans - Summary of Stock Option Activities (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding Beginning Balance, Number of Options	1,137,558
Expired, Number of Options	(330,700)
Exercised, Number of Options	(4,000)
Outstanding Ending Balance, Number of Options	802,858	1,137,558
Vested and expected to vest, Number of Options	802,858
Outstanding Beginning Balance, Weighted Average Exercise Price of Stock Options	$ 10.64
Expired, Weighted Average Exercise Price of Stock Options	17.37
Exercised, Weighted Average Exercise Price of Stock Options	6.92
Outstanding Ending Balance, Weighted Average Exercise Price of Stock Options	7.89	$ 10.64
Vested and Exercisable, Weighted Average Exercise Price of Stock Options	$ 7.89
Outstanding Beginning Balance, Aggregate Intrinsic Value of Stock Options	$ 1,702
Exercised, Aggregate Intrinsic Value of Stock Options	13
Outstanding Ending Balance, Aggregate Intrinsic Value of Stock Options	459	$ 1,702
Vested and expected to vest, Aggregate Intrinsic Value of Stock Options	$ 459
Outstanding, Weighted Average Remaining Contractual Life of Stock Options	2 years	2 years 3 months 18 days
Vested and expected to vest, Weighted Average Remaining Contractual Life of Stock Options	2 years

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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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 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 of the plan that expired.

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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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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. 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 share options (or share units) exercised during the current period.

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