XML 57 R49.htm IDEA: XBRL DOCUMENT
v3.23.1

Fair Value Measurements (Details) - Schedule of estimated fair values - USD ($) | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Securities owned, at fair value |  |
Total Securities owned, at fair value | $ 7,609,000 | $ 3,204,000
Securities sold, not yet purchased, at fair value |  |
Total Securities sold, not yet purchased, at fair value | 2,000 | 2,000
U.S. government securities [Member] |  |
Cash and securities segregated for regulatory purposes |  |
Cash and securities segregated for regulatory purposes | 195,906,000 | 140,978,000
U.S. government securities owned [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value | 6,856,000 | 2,808,000
Certificates of deposit [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value | 194,000 | 92,000
Municipal securities [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value | 166,000 | 52,000
Corporate bonds [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value | 141,000 | 7,000
Equity securities [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value | 252,000 | 245,000
Securities sold, not yet purchased, at fair value |  |
Total Securities sold, not yet purchased, at fair value | 2,000 | 2,000
Level 1 [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value | 6,910,000 | 2,871,000
Securities sold, not yet purchased, at fair value |  |
Total Securities sold, not yet purchased, at fair value | 2,000 | 2,000
Level 1 [Member] | U.S. government securities [Member] |  |
Cash and securities segregated for regulatory purposes |  |
Cash and securities segregated for regulatory purposes | 195,906,000 | 140,978,000
Level 1 [Member] | U.S. government securities owned [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value | 6,856,000 | 2,808,000
Level 1 [Member] | Certificates of deposit [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value |  |
Level 1 [Member] | Municipal securities [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value |  |
Level 1 [Member] | Corporate bonds [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value |  |
Level 1 [Member] | Equity securities [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value | 54,000 | 63,000
Securities sold, not yet purchased, at fair value |  |
Total Securities sold, not yet purchased, at fair value | 2,000 | 2,000
Level 2 [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value | 699,000 | 333,000
Securities sold, not yet purchased, at fair value |  |
Total Securities sold, not yet purchased, at fair value |  |
Level 2 [Member] | U.S. government securities [Member] |  |
Cash and securities segregated for regulatory purposes |  |
Cash and securities segregated for regulatory purposes |  |
Level 2 [Member] | U.S. government securities owned [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value |  |
Level 2 [Member] | Certificates of deposit [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value | 194,000 | 92,000
Level 2 [Member] | Municipal securities [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value | 166,000 | 52,000
Level 2 [Member] | Corporate bonds [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value | 141,000 | 7,000
Level 2 [Member] | Equity securities [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value | 198,000 | 182,000
Securities sold, not yet purchased, at fair value |  |
Total Securities sold, not yet purchased, at fair value |  |
Level 3 [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value |  |
Securities sold, not yet purchased, at fair value |  |
Total Securities sold, not yet purchased, at fair value |  |
Level 3 [Member] | U.S. government securities [Member] |  |
Cash and securities segregated for regulatory purposes |  |
Cash and securities segregated for regulatory purposes |  |
Level 3 [Member] | U.S. government securities owned [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value |  |
Level 3 [Member] | Certificates of deposit [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value |  |
Level 3 [Member] | Municipal securities [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value |  |
Level 3 [Member] | Corporate bonds [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value |  |
Level 3 [Member] | Equity securities [Member] |  |
Securities owned, at fair value |  |
Total Securities owned, at fair value |  |
Securities sold, not yet purchased, at fair value |  |
Total Securities sold, not yet purchased, at fair value |  |

X
- Definition Cash and securities segregated for regulatory purposes. + References No definition available. + Details
Name: | sieb_CashAndSecuritiesSegregatedForRegulatoryPurposes
Namespace Prefix: | sieb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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

X
- Definition Fair value portion of investments accounted under the equity method. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2E Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(12)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_EquityMethodInvestmentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of financial instruments sold short by a broker-dealer for their own account (proprietary securities) for trading or investment purposes determined by management based upon quoted prices of a financial instrument with similar characteristics or on a valuation technique or model. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481961/940-320-45-2 + Details
Name: | us-gaap_SecurityOwnedAndSoldNotYetPurchasedFairValueSecuritySoldNotYetPurchased
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=sieb_USGovernmentSecuritiesOwnedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_CertificatesOfDepositMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_MunicipalNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_CorporateBondSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SecurityOwnedAndSoldNotYetPurchasedAtFairValueAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |