Stockholders' Equity - Summary of RSU and Performance Award Activity (Detail) - $ / shares	3 Months Ended	9 Months Ended
Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2024
RSU awards
Outstanding
Beginning unvested balance (in shares)	11,311,784	11,053,204	10,927,261	10,927,261
Granted (in shares)	30,842	781,581	1,286,831
Vested (in shares)	(167,768)	(206,049)	(212,633)
Forfeited (in shares)	(701,013)	(316,952)	(948,255)
Ending unvested balance (in shares)	10,473,845	11,311,784	11,053,204	10,473,845
Weighted-average grant date fair value
Beginning unvested balance (in dollars per share)	$ 1.59	$ 1.72	$ 1.94	$ 1.94
Granted (in dollars per share)	1.54	0.99	0.65
Vested (in dollars per share)	2.11	3.71	3.60
Forfeited (in dollars per share)	1.33	1.88	2.50
Ending unvested balance (in dollars per share)	$ 1.60	$ 1.59	$ 1.72	$ 1.60
Performance-based stock awards
Outstanding
Beginning unvested balance (in shares)	1,780,168	1,794,893	2,118,843	2,118,843
Forfeited (in shares)	(85,252)	(14,725)	(323,950)
Ending unvested balance (in shares)	1,694,916	1,780,168	1,794,893	1,694,916
Weighted-average grant date fair value
Beginning unvested balance (in dollars per share)	$ 5.51	$ 5.52	$ 5.77	$ 5.77
Forfeited (in dollars per share)	6.46	7.07	7.07
Ending unvested balance (in dollars per share)	$ 5.46	$ 5.51	$ 5.52	$ 5.46

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

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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No definition available.

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