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Recurring Fair Value Measurements, Assets and Liabilities Measured at Fair Value on Recurring Basis (FY) (Details) - USD ($) | Sep. 30, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Liabilities [Abstract] |  |  |
Warrant liability | $ 1,816,000 | $ 1,135,000 | $ 11,804,000
Recurring [Member] | Level 1 [Member] |  |  |
Assets [Abstract] |  |  |
Investments held in Trust Account | 61,539,627 | 237,038,010 | 234,603,156
Recurring [Member] | Level 1 [Member] | Public Warrants [Member] |  |  |
Liabilities [Abstract] |  |  |
Warrant liability | 920,000 | 575,000 | 5,980,000
Recurring [Member] | Level 1 [Member] | Private Warrants [Member] |  |  |
Liabilities [Abstract] |  |  |
Warrant liability | 0 | 0 | 0
Recurring [Member] | Level 2 [Member] |  |  |
Assets [Abstract] |  |  |
Investments held in Trust Account | 0 | 0 | 0
Recurring [Member] | Level 2 [Member] | Public Warrants [Member] |  |  |
Liabilities [Abstract] |  |  |
Warrant liability | 0 | 0 | 0
Recurring [Member] | Level 2 [Member] | Private Warrants [Member] |  |  |
Liabilities [Abstract] |  |  |
Warrant liability | 0 | 0 | 0
Recurring [Member] | Level 3 [Member] |  |  |
Assets [Abstract] |  |  |
Investments held in Trust Account | 0 | 0 | 0
Recurring [Member] | Level 3 [Member] | Public Warrants [Member] |  |  |
Liabilities [Abstract] |  |  |
Warrant liability | 0 | 0 | 0
Recurring [Member] | Level 3 [Member] | Private Warrants [Member] |  |  |
Liabilities [Abstract] |  |  |
Warrant liability | $ 896,000 | $ 560,000 | $ 5,824,000

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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483466/210-20-50-3 + Details
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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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