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Recurring Fair Value Measurements, Changes in Fair Value of Warrant Liabilities (Q3) (Details) - Level 3 [Member] - USD ($)	3 Months Ended			10 Months Ended	12 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2021	Dec. 31, 2022
Changes in Fair Value of Warrant Liabilities [Roll Forward]
Fair value, beginning of period	$ 784,000	$ 560,000	$ 560,000	$ 0	$ 5,824,000
Change in fair value	112,000	224,000	0	(4,767,000)	(5,264,000)
Fair value, end of period	$ 896,000	$ 784,000	$ 560,000	$ 5,824,000	$ 560,000

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Definition

Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-SubTopic 10
-Topic 820
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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