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H - STOCKHOLDERS' EQUITY (Details Narrative) (USD $)	Dec. 31, 2014	Dec. 31, 2013
H - Stockholders Equity Details Narrative
Net capital	$ 5,100,000us-gaap_NetCapital	$ 13,000,000us-gaap_NetCapital
Net capital requirements	$ 250,000us-gaap_MinimumNetCapitalRequired1	$ 250,000us-gaap_MinimumNetCapitalRequired1

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- Details

Name:	SIEB_FStockholdersEquityDetailsNarrativeAbstract
Namespace Prefix:	SIEB_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of minimum net capital required to be maintained to engage in securities transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Rule 15c3

-Number 240

-Section 1

-Paragraph 1

-Subparagraph i

-Article 15c3

-Subsection a

+ Details

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Namespace Prefix:	us-gaap_
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X

- Definition

Net capital is equal to the net worth of the broker dealer, less certain items such as exchange memberships, carrying value of securities not readily marketable, haircuts on marketable securities in proprietary accounts, furniture and equipment and other illiquid assets as defined.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Rule 15c3

-Number 240

-Section 1

-Paragraph 1

-Subparagraph ii

-Article 15c3

-Subsection a

+ Details

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