Stock-based Compensation (FY) - Expense Recognized (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||||
| Total stock-based compensation | $ 419 | $ 1,793 | $ 1,348 | $ 3,799 | $ 6,245 | $ 8,826 |
| General and administrative: us-gaap:GeneralAndAdministrativeExpense | ||||||
| Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||||
| Total stock-based compensation | 336 | 820 | 762 | 1,771 | 3,044 | 4,220 |
| General and administrative: us-gaap:ResearchAndDevelopmentExpense | ||||||
| Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||||
| Total stock-based compensation | $ 83 | $ 973 | $ 586 | $ 2,028 | $ 3,201 | $ 4,606 |