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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021
Statement of Cash Flows [Abstract] |  |
Purchase of equity method investment | $ 350,000 | $ 350,000

X
- Definition The amount of purchase of equity method investment. + References No definition available. + Details
Name: | SIEB_PurchaseOfEquityMethodInvestment
Namespace Prefix: | SIEB_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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