Summary of Significant Accounting Policies - Schedule of Company’s Securities (Details)	12 Months Ended
	Dec. 31, 2025
Certificates of deposit, Corporate bonds, municipal securities, options [Member]
Schedule of Company’s Securities [Line Items]
Classification	Trading
Consolidated Statements of Financial Condition	Securities owned, at fair value, Securities sold, not yet purchased at fair value
Recording of Realized and Unrealized Gain or Loss	Principal transactions and proprietary trading
Equities, options [Member]
Schedule of Company’s Securities [Line Items]
Classification	Trading
Consolidated Statements of Financial Condition	Securities owned, at fair value; Securities sold, not yet purchased at fair value
Recording of Realized and Unrealized Gain or Loss	Market making, Principal transactions and proprietary trading
U.S. government securities [Member]
Schedule of Company’s Securities [Line Items]
Classification	Trading
Consolidated Statements of Financial Condition	Securities owned, at fair value
Recording of Realized and Unrealized Gain or Loss	Principal transactions and proprietary trading
U.S. government securities [Member]
Schedule of Company’s Securities [Line Items]
Classification	Trading
Consolidated Statements of Financial Condition	Cash and securities segregated for regulatory purposes
Recording of Realized and Unrealized Gain or Loss	Principal transactions and proprietary trading

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Subsection 04
-Paragraph a
-Publisher SEC

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-X (SX)
-Number 210
-Section 5
-Subsection 04
-Paragraph c
-Subparagraph Schedule I
-Publisher SEC

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-X (SX)
-Number 210
-Section 7
-Subsection 05
-Paragraph c
-Subparagraph Schedule II
-Publisher SEC

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-X (SX)
-Number 210
-Section 9
-Subsection 06
-Publisher SEC

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

Reference 8: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481231/810-10-45-11

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 205
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 7
-Subparagraph (SAB Topic 1.B.2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480922/205-10-S99-7

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 205
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481003/205-10-S50-2

+ Details

SIEBERT FINANCIAL CORP 10-K