Contingent Liabilities	6 Months Ended
Jun. 30, 2011
Notes to Financial Statements
Contingent Liabilities	Retail customer transactions are cleared through clearing brokers on a fully disclosed basis. If customers do not fulfill their contractual obligations, the clearing broker may charge Siebert for any loss incurred in connection with the purchase or sale of securities at prevailing market prices to satisfy the customer obligations. Siebert regularly monitors the activity in its customer accounts for compliance with its margin requirements. Siebert is exposed to the risk of loss on unsettled customer transactions if customers are unable to fulfill their contractual obligations. There were no material losses for unsettled customer transactions for the six months ended June 30, 2011 and 2010. Siebert is party to certain claims, suits and complaints arising in the ordinary course of business. In the opinion of management all such claims, suits and complaints are without merit, or involved amounts which would not have a significant effect on the financial position or results of operations of the Company.

Disclosure of accounting policy for the claims loss reserve for insurance contracts with a life contingency (permanent life, some term life, accident and health, some annuities), describing the loss exposures and bases and methodologies for making the relevant accounting estimates.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 94-5
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 60
-Paragraph 60
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-URI http://asc.fasb.org/topic&trid=2303980

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 7
-Section 03
-Paragraph 13
-Subparagraph b

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-PLI
-Chapter 4
-Paragraph 2, 34, 132, 133
-IssueDate 2006-09-01
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details