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Related Party Transactions, Founder Shares (FY) (Details)
9 Months Ended 10 Months Ended 12 Months Ended
Sep. 12, 2023
$ / shares
Oct. 06, 2021
USD ($)
shares
Mar. 15, 2021
USD ($)
shares
Sep. 30, 2023
USD ($)
$ / shares
shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2022
USD ($)
$ / shares
shares
Founder Shares [Abstract]            
Proceeds from issuance of ordinary share | $         $ 25,000 $ 0
Stock conversion basis at time of business combination       1   1
Class A Common Stock [Member]            
Founder Shares [Abstract]            
Common stock, shares outstanding (in shares)       0 0 0
Class B Common Stock [Member]            
Founder Shares [Abstract]            
Common stock, shares outstanding (in shares)       5,750,000 5,750,000 5,750,000
Founder Shares [Member] | Class A Common Stock [Member] | Minimum [Member]            
Founder Shares [Abstract]            
Period after initial Business Combination       150 days   150 days
Founder Shares [Member] | Class B Common Stock [Member] | Over-Allotment Option [Member]            
Founder Shares [Abstract]            
Number of shares subject to forfeiture (in shares)           0
Founder Shares [Member] | Class B Common Stock [Member] | Over-Allotment Option [Member] | Maximum [Member]            
Founder Shares [Abstract]            
Number of shares subject to forfeiture (in shares)     750,000      
Sponsor [Member]            
Founder Shares [Abstract]            
Stock conversion basis at time of business combination 1          
Holding period for transfer, assignment or sale of Founder Shares       360 days    
Threshold trading days       20 days    
Threshold consecutive trading days       30 days    
Period after initial Business Combination       150 days    
Sponsor [Member] | Minimum [Member]            
Founder Shares [Abstract]            
Share price (in dollars per share) | $ / shares $ 12          
Sponsor [Member] | Founder Shares [Member] | Class A Common Stock [Member]            
Founder Shares [Abstract]            
Threshold trading days       20 days   20 days
Threshold consecutive trading days       30 days   30 days
Sponsor [Member] | Founder Shares [Member] | Class A Common Stock [Member] | Minimum [Member]            
Founder Shares [Abstract]            
Share price (in dollars per share) | $ / shares       $ 12   $ 12
Sponsor [Member] | Founder Shares [Member] | Class B Common Stock [Member]            
Founder Shares [Abstract]            
Proceeds from issuance of ordinary share | $     $ 25,000 $ 25,000    
Shares issued (in shares)     7,187,500 5,750,000    
Ownership interest, as converted percentage     20.00%      
Number of shares surrender for no consideration (in shares)   1,437,500        
Shares surrendered, consideration | $   $ 0        
Common stock, shares outstanding (in shares)   5,750,000        
Stock conversion basis at time of business combination       1   1
Holding period for transfer, assignment or sale of Founder Shares       1 year   1 year