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v3.25.1

Deferred Contract Incentive (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Deferred Contract Incentive [Line Items] |  |
Business development credit | $ 3,000,000 |
Deferred contract incentive | 100,000 |
Deferred contract incentive | 496,000 | $ 1,246,000
National Financial Services LLC [Member] |  |
Deferred Contract Incentive [Line Items] |  |
Business development credit | 3,000,000 |
Deferred contract incentive | 100,000 |
Contra expense | 850,000 | 850,000
Deferred contract incentive | $ 500,000 | $ 1,200,000
Maximum [Member] |  |
Deferred Contract Incentive [Line Items] |  |
Contract expense, term | 4 years |
Minimum [Member] |  |
Deferred Contract Incentive [Line Items] |  |
Contract expense, term | 1 year |

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- Definition Contra expense during the period. + References No definition available. + Details
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Namespace Prefix: | sieb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Deferred contract incentive. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of deferred contract incentive. + References No definition available. + Details
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Namespace Prefix: | sieb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Business development involves the development of products and services, their delivery, design and their implementation. Business development includes a number of techniques designed to grow an economic enterprise. Such techniques include, but are not limited to, assessments of marketing opportunities and target markets, intelligence gathering on customers and competitors, generating leads for possible sales, follow-up sales activity, formal proposal writing and business model design. Business development involves evaluating a business and then realizing its full potential, using such tools as marketing, sales, information management and customer service. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(6)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
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Period Type: | duration

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- 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 No definition available. + Details
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Period Type: | duration

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- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Details
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- Details
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- Details
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