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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (Parentheticals) - USD ($) | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022
Statement of Cash Flows [Abstract] |  |
Net of cash paid | $ 350,000 | $ 350,000

X
- Definition Net of cash paid. + References No definition available. + Details
Name: | sieb_NetOfCashPaid
Namespace Prefix: | sieb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_StatementOfCashFlowsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration