Increase in number of employee stock purchase plan shares authorized for issuance.

No definition available.

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- Definition

Aggregate number of common shares reserved for future issuance.

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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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.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Equity Plans and Stock-Based Compensation - Additional Information (Detail) - shares	6 Months Ended
	Jun. 30, 2024	May 05, 2024	Dec. 31, 2023	Jun. 30, 2021	Jan. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Increase in aggregate number of shares of common stock authorized for issuance		11,400,000
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options vesting period	7 years
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock units awards outstanding	5,669,000		4,445,000
Performance Based Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock units awards outstanding	1,115,000		557,000
Minimum \| Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expiration period	7 years
Maximum \| Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expiration period	10 years
2018 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Newly reserved shares of common stock	14,193,145			3,250,000	1,500,000
2014 Employee Stock Purchase Plan \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares issued to employees		41,440,250
Performance Based Vesting Schedule [Member] \| Performance Based Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock units awards outstanding	36,000