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11. Impairment of Fixed Assets (Details Narrative) (USD $)	Sep. 30, 2012
Accounting Policies [Abstract]
Unamortized carrying value of development costs write off	$ 433,000

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- Definition

Custom Element.

+ References

No definition available.

+ Details

Name:	SIEB_UnamortizedCarryingValueOfDevelopmentCostsWriteOff
Namespace Prefix:	SIEB_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Details

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