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