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Income Tax (FY) (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 10 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2021 | Dec. 31, 2022
Deferred Tax Asset [Abstract] |  |  |  |  |  |
Federal net operating loss |  |  |  |  | $ 35,239 | $ 0
Organizational costs/Startup expenses |  |  |  |  | 54,666 | 418,972
Total deferred tax asset |  |  |  |  | 89,905 | 418,972
Valuation allowance |  |  |  |  | (89,905) | (418,972)
Deferred tax asset, net of allowance |  |  |  |  | 0 | 0
Federal [Abstract] |  |  |  |  |  |
Current |  |  |  |  | 0 | 645,442
Deferred |  |  |  |  | (89,905) | (329,066)
State and Local [Abstract] |  |  |  |  |  |
Current |  |  |  |  | 0 | 0
Deferred |  |  |  |  | 0 | 0
Change in valuation allowance |  |  |  |  | 89,905 | 329,066
Income tax provision | $ 154,799 | $ 212,593 | $ 938,294 | $ 230,387 | 0 | 645,442
Operating Loss Carryforwards [Abstract] |  |  |  |  |  |
Net operating loss carryover |  |  |  |  | $ 167,803 | $ 0
Reconciliation of Federal Income Tax Rate [Abstract] |  |  |  |  |  |
Statutory federal income tax rate | 21.00% | 21.00% | 21.00% | 21.00% | 21.00% | 21.00%
State taxes, net of federal tax benefit |  |  |  |  | 0.00% | 0.00%
Change in fair value of warrant liability |  |  |  |  | (26.10%) | (18.40%)
Warrant transaction costs |  |  |  |  | 2.80% | 0.00%
Change in valuation allowance |  |  |  |  | 2.30% | 2.70%
Other |  |  |  |  | 0.00% | 0.00%
Income tax provision | (9.58%) | 10.04% | 428.34% | 2.31% | 0.00% | 5.30%

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