Redeemable Convertible Preferred Stock, Redeemable Common Stock, and Stockholders Equity (Deficit) - Restricted Stock Units (Q2) (Details) - shares |
3 Months Ended | 6 Months Ended | 12 Months Ended | |
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Restricted Stock Units (RSUs) | ||||
| Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] | ||||
| Vesting period | 4 years | 4 years | ||
| Granted (in shares) | 13,188,000 | 15,733,000 | ||
| RSAs unvested (in shares) | 25,677,000 | 25,677,000 | 15,455,000 | 0 |
| Restricted Stock | ||||
| Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] | ||||
| Vesting period | 4 years | |||
| Granted (in shares) | 1,602,257 | 1,602,257 | ||
| RSAs unvested (in shares) | 1,460,477 | 1,460,477 |
| X | ||||||||||
- 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
|
| X | ||||||||||
- Definition 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). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|