Equity and Stock-based Compensation - Stock Plans - Summary of Stock Option Transactions (Detail) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2024 USD ($) $ / shares shares
Share-Based Payment Arrangement [Abstract]
Outstanding, Beginning Balance, Shares \| shares	11,104
Granted, Shares \| shares	5,518
Forfeited, Shares \| shares	(5,848)
Expired, Shares \| shares	(919)
Outstanding, Ending Balance, Shares \| shares	9,855
Vested and expected to vest, Shares \| shares	9,359
Exercisable, Shares \| shares	5,886
Outstanding, Beginning Balance, Weighted Average Exercise Price per Share \| $ / shares	$ 18.21
Granted, Weighted Average Exercise Price per Share \| $ / shares	1.74
Forfeited, Weighted Average Exercise Price per Share \| $ / shares	4.66
Expired, Weighted Average Exercise Price per Share \| $ / shares	28.03
Outstanding, Ending Balance, Weighted Average Exercise Price per Share \| $ / shares	16.12
Vested and expected to vest, Weighted Average Exercise per Share \| $ / shares	16.82
Exercisable, Weighted Average Exercise Price per Share \| $ / shares	$ 24.61
Outstanding, Weighted Average Remaining Contractual Life	6 years 6 months 21 days
Vested and expected to vest, Weighted Average Remaining Contractual Life	5 years 2 months 26 days
Exercisable, Weighted Average Remaining Contractual Life	4 years 4 months 13 days
Outstanding, Aggregate Intrinsic Value \| $	$ 0
Vested and expected to vest, Aggregate Intrinsic Value \| $	0
Exercisable, Aggregate Intrinsic Value \| $	$ 0

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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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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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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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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
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Number of options outstanding, including both vested and non-vested options.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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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 grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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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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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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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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