Organization and Business Operations, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard (Q1) (Details)	Oct. 16, 2023 Shareholder
Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard [Abstract]
Minimum number of public holders required for continued listing	400

The minimum number of public holders required for continued listing on the Nasdaq Global Market.

No definition available.

Name:	fiac_MinimumNumberOfPublicHoldersRequiredForContinuedListing
Namespace Prefix:	fiac_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant