v3.25.3
Fair Value - Fair Value Hierarchy for Assets and Liabilities Measured at Fair Value (FY) (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Oct. 22, 2024
Oct. 01, 2024
Dec. 31, 2023
Assets:          
Investment in debt securities - AFS $ 9,017 $ 11,187     $ 0
Exchange-traded investments at FVTNI   0     9,685
Liabilities, Fair Value Disclosure [Abstract]          
Earnout liability 4,370 14,752      
Warrant liability 22,996 34,023     0
Embedded derivative liability 1,796 0     1,994
Accounts payable 3,710 3,248      
Related party          
Liabilities, Fair Value Disclosure [Abstract]          
Accounts payable   0     347
WTI warrants          
Liabilities, Fair Value Disclosure [Abstract]          
Warrant liability   17,230 $ 15,690    
Private placement warrants          
Liabilities, Fair Value Disclosure [Abstract]          
Warrant liability 7,146 16,793   $ 786  
Quoted Prices in Active Markets for Identical Assets (Level 1)          
Assets:          
Investment in debt securities - AFS 0 0      
Exchange-traded investments at FVTNI         9,685
Liabilities, Fair Value Disclosure [Abstract]          
Earnout liability 0 0      
Embedded derivative liability 0       0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Related party          
Liabilities, Fair Value Disclosure [Abstract]          
Accounts payable         347
Quoted Prices in Active Markets for Identical Assets (Level 1) | Private placement warrants          
Liabilities, Fair Value Disclosure [Abstract]          
Warrant liability 0 0      
Significant Other Observable Inputs (Level 2)          
Assets:          
Investment in debt securities - AFS 0 0      
Exchange-traded investments at FVTNI         0
Liabilities, Fair Value Disclosure [Abstract]          
Earnout liability 0 0      
Embedded derivative liability 0       0
Significant Other Observable Inputs (Level 2) | Related party          
Liabilities, Fair Value Disclosure [Abstract]          
Accounts payable         0
Significant Other Observable Inputs (Level 2) | Private placement warrants          
Liabilities, Fair Value Disclosure [Abstract]          
Warrant liability 7,146 16,793      
Significant Unobservable Inputs (Level 3)          
Assets:          
Investment in debt securities - AFS 9,017 11,187      
Exchange-traded investments at FVTNI         0
Liabilities, Fair Value Disclosure [Abstract]          
Earnout liability 4,370 14,752      
Embedded derivative liability 1,796       1,994
Significant Unobservable Inputs (Level 3) | Related party          
Liabilities, Fair Value Disclosure [Abstract]          
Accounts payable         $ 0
Significant Unobservable Inputs (Level 3) | WTI warrants          
Liabilities, Fair Value Disclosure [Abstract]          
Warrant liability   17,230      
Significant Unobservable Inputs (Level 3) | Private placement warrants          
Liabilities, Fair Value Disclosure [Abstract]          
Warrant liability $ 0 $ 0