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Related Party Transactions, Related Party Loans (Q3) (Details) - USD ($) | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022 | May 09, 2023 | Dec. 31, 2021
Related Party Loans [Abstract] |  |  |  |
Promissory note - related party | $ 1,025,000 | $ 0 |  |
Sponsor, Affiliate of Sponsor, or Certain Company Officers and Directors [Member] | Working Capital Loans [Member] |  |  |  |
Related Party Loans [Abstract] |  |  |  |
Maximum amount of convertible loans | $ 1,500,000 | $ 1,500,000 |  |
Conversion price (in dollars per share) | $ 1 | $ 1 |  |
Promissory note - related party |  | $ 0 |  | $ 0
Promissory Note [Member] |  |  |  |
Related Party Loans [Abstract] |  |  |  |
Promissory note - related party | $ 1,025,000 | $ 0 |  |
Promissory Note [Member] | Maximum [Member] |  |  |  |
Related Party Loans [Abstract] |  |  |  |
Principal amount | $ 1,500,000 |  | $ 1,500,000 |
Sponsor [Member] |  |  |  |
Related Party Loans [Abstract] |  |  |  |
Principal amount |  |  | $ 487,500 |

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