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Fair Value Measurements (Details) - Schedule of estimated fair values - USD ($) | Sep. 30, 2023 | Dec. 31, 2022
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Schedule of Estimated Fair Values [Abstract] |  |
Equity method investment in related party |  | $ 2,584,000

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- Definition Equity method investment in related party. + References No definition available. + Details
Name: | sieb_EquityMethodInvestmentInRelatedParty1
Namespace Prefix: | sieb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | sieb_FairValueMeasurementsDetailsScheduleofestimatedfairvaluesLineItems
Namespace Prefix: | sieb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration