Stockholders’ Deficit - Equity incentive plans (Narrative) (Details) - USD ($) shares in Millions, $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Dec. 31, 2024 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Shares issued and outstanding (in shares) | 0.0 | 0.1 |
| 2018 Plan | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Expiration period | 10 years | |
| Remaining unamortized stock-based compensation | $ 682.8 | |
| Award requisite period | 2 years 9 months 18 days | |
| 2018 Plan | Employee Stock Option | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Expiration period | 10 years | |
| Vesting period | 4 years | |
| Equity Incentive Plans | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Shares issued and outstanding (in shares) | 27.8 | |
| Shares available for grant (in shares) | 131.8 |
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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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