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v3.20.1

Referral Fees (Details) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Referral Fees |  |
Referral fees | $ 111,000 |

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- Definition Referral fees. + References No definition available. + Details
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Namespace Prefix: | SIEB_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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