Reimbursement of expenses.

No definition available.

Name:	FGNX_ReimbursementOfExpenses
Namespace Prefix:	FGNX_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Shared services fee.

+ References

No definition available.

+ Details

Name:	FGNX_SharedServicesFee
Namespace Prefix:	FGNX_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Sum of the carrying amounts as of the balance sheet date of all investments.

+ References

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+ Details

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

- Definition

Cash received from principal payments made on loans related to operating activities.

+ References

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+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details

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

- Definition

Income earned by providing the use of assets to an outside party in exchange for a payment or series of payments that is nonoperating in nature.

+ References

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+ Details

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

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	dei_LegalEntityAxis=FGNX_FGCommunitiesIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=FGNX_CraveworthyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=FGNX_FGImperiiInvestorsLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=FGNX_SaltireHoldingsLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=FGNX_FundamentalGlobalManagementLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=FGNX_SharedServicesAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Related Party Transactions (Details Narrative) - USD ($)		3 Months Ended	12 Months Ended
	Mar. 31, 2020	Sep. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Mar. 16, 2023	Oct. 31, 2022
Related Party Transaction [Line Items]
Investments				$ 60,073,000
FG Communities Inc [Member]
Related Party Transaction [Line Items]
Investments						$ 2,000,000.0
Craveworthy [Member]
Related Party Transaction [Line Items]
Senior unsecured promissory note					$ 200,000
FG Imperii Investors LLC [Member]
Related Party Transaction [Line Items]
Senior unsecured promissory note		$ 200,000
Saltire [Member]
Related Party Transaction [Line Items]
Rental income			$ 400,000
Fundamental Global Management LLC [Member] \| Shared Services Agreement [Member]
Related Party Transaction [Line Items]
Shared services fee	$ 456,000		2,500,000	$ 1,800,000
Reimbursement of expenses			$ 700,000