Name:	fiac_CashDepositedInTrustAccountPerUnit
Namespace Prefix:	fiac_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

Number of warrants or rights issued during the period.

No definition available.

Name:	fiac_ClassOfWarrantOrRightIssued
Namespace Prefix:	fiac_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Fair market value as a percentage of the net assets held in the Trust Account (excluding the deferred underwriting commissions and taxes payable on the income earned on the Trust Account) at the time of the agreement to enter into the initial Business Combination.

No definition available.

Name:	fiac_FairMarketValueAsPercentageOfNetAssetsHeldInTrustAccountIncludedInInitialBusinessCombination
Namespace Prefix:	fiac_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Interest received on the Trust Account that can be used to pay dissolution expenses if a Business Combination is not completed with the Combination Period.

No definition available.

Name:	fiac_InterestOnTrustAccountToBeHeldToPayDissolutionExpenses
Namespace Prefix:	fiac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Net tangible asset threshold for redeeming Public Shares.

No definition available.

Name:	fiac_NetTangibleAssetThresholdForRedeemingPublicShares
Namespace Prefix:	fiac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Number of days prior to the consummation in initial Business Combination.

No definition available.

Name:	fiac_NumberOfDaysPriorInInitialBusinessCombination
Namespace Prefix:	fiac_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Number of operating businesses that must be included in initial Business Combination.

No definition available.

Name:	fiac_NumberOfOperatingBusinessesIncludedInInitialBusinessCombination
Namespace Prefix:	fiac_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Amount of other costs incurred in connection with the offering of Units in Initial Public Offering and Private Placement of Warrants.

No definition available.

Name:	fiac_OtherOfferingCosts
Namespace Prefix:	fiac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Percentage of Public Shares that would not be redeemed if a Business Combination is not completed within the Initial Combination Period.

No definition available.

Name:	fiac_PercentageOfPublicSharesThatWouldNotBeRedeemedIfBusinessCombinationIsNotCompletedWithinInitialCombinationPeriod
Namespace Prefix:	fiac_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Amended and restated certificate of incorporation requires an amendment be approved by percentage of holders of the Company's outstanding common stock.

No definition available.

Name:	fiac_PercentageOfShareholdersApprovalForAmendment
Namespace Prefix:	fiac_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Period of time from closing of Initial Public Offering to complete Business Combination, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	fiac_PeriodToCompleteBusinessCombinationFromClosingOfInitialPublicOffering
Namespace Prefix:	fiac_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Period of time to redeem Public Shares if Business Combination is not completed within the Initial Combination Period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	fiac_PeriodToRedeemPublicSharesIfBusinessCombinationIsNotCompletedWithinInitialCombinationPeriod
Namespace Prefix:	fiac_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Post-transaction ownership percentage of the outstanding voting securities of the target business sufficient for it not to be required to register as an investment company under the Investment Company Act of 1940.

No definition available.

Name:	fiac_PostTransactionOwnershipPercentageOfTheTargetBusiness
Namespace Prefix:	fiac_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

The price per share at which stock of the entity can be redeemed by the holders of the Public Shares (public stockholders).

No definition available.

Name:	fiac_RedemptionPricePerShare
Namespace Prefix:	fiac_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

Amount of costs incurred and deferred for underwriting fees in connection with the offering of Units in Initial Public Offering and Private Placement of Warrants.

No definition available.

Name:	fiac_UnderwritingFeesDeferred
Namespace Prefix:	fiac_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Number of new units issued during the period. Each unit consists of one share of Class A Common Stock and one-half of one redeemable Warrant.

No definition available.

Name:	fiac_UnitsIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	fiac_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The number of securities into which each unit may be converted. For example, but not limited to, each unit may be converted into two shares of common stock.

No definition available.

Name:	fiac_UnitsNumberOfSecuritiesCalledByUnits
Namespace Prefix:	fiac_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Name:	us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Exercise price per share or per unit of warrants or rights outstanding.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

No definition available.

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Face amount or stated value per share of common stock.

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

Specific incremental costs directly attributable to a proposed or actual offering of securities which are deferred at the end of the reporting period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.8)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.A)
-URI http://asc.fasb.org/extlink&oid=122040515&loc=d3e105025-122735

Name:	us-gaap_DeferredOfferingCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Cash paid for expenses incurred during underwriting activities (the process to review insurance applications, evaluate risks, accept or reject applications, and determine the premiums to be charged) for insurance companies.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3536-108585

Name:	us-gaap_PaymentsForUnderwritingExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of cash outflow for purchase of marketable security.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26853-111562

Name:	us-gaap_PaymentsToAcquireMarketableSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The cash inflow associated with the amount received from entity's first offering of stock to the public.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585

Name:	us-gaap_ProceedsFromIssuanceInitialPublicOffering
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

Name:	us-gaap_ProceedsFromIssuanceOfPrivatePlacement
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

Name:	us-gaap_ProceedsFromIssuanceOrSaleOfEquityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

No definition available.

Name:	us-gaap_SaleOfStockPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

Per share or per unit amount of equity securities issued.

No definition available.

Name:	us-gaap_SharesIssuedPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_RetainedEarningsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_AdditionalPaidInCapitalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ClassOfWarrantOrRightAxis=fiac_PrivatePlacementWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_IPOMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ClassOfWarrantOrRightAxis=fiac_PublicWarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_OverAllotmentOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: