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E - FURNITURE, EQUIPMENT AND LEASEHOLD IMPROVEMENTS, NET (Details Narrative) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Depreciation and amortization expense | $ 257,000 us-gaap_DepreciationDepletionAndAmortization | $ 120,000 us-gaap_DepreciationDepletionAndAmortization | $ 274,000 us-gaap_DepreciationDepletionAndAmortization
Siebert, Brandford, Shank Financial LLC and Subsidiary |  |  |
Depreciation and amortization expense | 226,761 us-gaap_DepreciationDepletionAndAmortization / dei_LegalEntityAxis = SIEB_SbsFinancialMember |  |
SBS |  |  |
Depreciation and amortization expense |  | $ 250,154 us-gaap_DepreciationDepletionAndAmortization / dei_LegalEntityAxis = SIEB_SbsMember | $ 266,093 us-gaap_DepreciationDepletionAndAmortization / dei_LegalEntityAxis = SIEB_SbsMember

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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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