Debt Instrument, Deferred Purchase Consideration

No definition available.

Name:	rily_DebtInstrumentDeferredPurchaseConsideration
Namespace Prefix:	rily_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder.

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Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

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+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

- 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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Period Type:	duration

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

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+ Details

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

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_NotesPayableOtherPayablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=rily_ClearingOrganisationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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NOTES PAYABLE - Narrative (Details) - USD ($) $ in Thousands		12 Months Ended
	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	May 03, 2024
Debt Instrument [Line Items]
Notes payable		$ 0	$ 28,021
Interest expense		92,736	133,308
Notes payable \| Clearing organization
Debt Instrument [Line Items]
Deferred cash consideration	$ 12,408
Interest expense		$ 426	1,640
Secured Convertible Promissory Note \| Notes payable
Debt Instrument [Line Items]
Principal amount				$ 15,000
Interest rate				10.00%
Contingent Interest Note \| Notes payable
Debt Instrument [Line Items]
Principal amount				$ 242
Nogin convertible note
Debt Instrument [Line Items]
Notes payable			$ 15,242