v3.25.3
Business Combinations - Narrative (FY) (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Oct. 02, 2024
USD ($)
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Oct. 01, 2024
USD ($)
$ / shares
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Dec. 31, 2023
USD ($)
Jun. 30, 2025
$ / shares
shares
Jun. 30, 2024
shares
Business Acquisition [Line Items]              
Common stock, authorized (in shares)   250,000,000 250,000,000 250,000,000   250,000,000  
Common stock, par value (in usd per share) | $ / shares   $ 0.0001 $ 0.0001 $ 0.0001   $ 0.0001  
Preferred stock, authorized (in shares)   25,000,000 25,000,000 25,000,000   25,000,000  
Preferred stock, par value (in usd per share) | $ / shares   $ 0.0001 $ 0.0001 $ 0.0001   $ 0.0001  
Common stock, issued (in shares)   44,597,154 43,589,850 44,597,154   55,221,494  
Common stock, outstanding (in shares)   44,597,154 43,589,850 44,597,154   55,221,494  
Warrants issued and outstanding (in shares)     18,645,997       0
Expense related to share-based award accelerated vesting | $ $ 223            
Innventure LLC              
Business Acquisition [Line Items]              
Parent ownership percentage     88.30%        
Noncontrolling owner percentage     13.70%        
Innventure LLC              
Business Acquisition [Line Items]              
Share rights ratio     1        
Shares issuable for acquisition (in shares) 43,494,999            
Contingent consideration (in shares)     5,000,000        
Transaction costs | $ $ 5,292   $ 9,627   $ 3,452    
Revenue of acquiree | $   $ 455          
Net loss of acquiree | $   $ 18,333          
Pro forma revenue | $       $ 1,219 1,117    
Pro forma net loss | $       $ 105,972 $ 74,165    
Innventure LLC | Learn CW              
Business Acquisition [Line Items]              
Transaction costs | $     $ 9,233        
Class B Preferred              
Business Acquisition [Line Items]              
Preferred stock, authorized (in shares)   3,000,000 3,000,000 3,000,000   3,000,000  
Preferred stock, par value (in usd per share) | $ / shares   $ 0.0001   $ 0.0001   $ 0.0001