Shared services fee.

No definition available.

Name:	FGF_SharedServicesFee
Namespace Prefix:	FGF_
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.

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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.

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+ Details

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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.

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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.

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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).

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- Details

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Balance Type:
Period Type:

- Details

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- Details

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Balance Type:
Period Type:

- Details

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Balance Type:
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Balance Type:
Period Type:

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Related Party Transactions (Details Narrative) - USD ($)		3 Months Ended	9 Months Ended
	Mar. 31, 2020	Sep. 30, 2025	Sep. 30, 2025	Sep. 30, 2024	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		$ 1,300,000	$ 1,300,000