CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net loss	$ (6,557,000)	$ (5,912,000)	$ (171,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	267,000	130,000	284,000
Gain on the disposition of business sold to affiliate	(1,820,000)
(Income) loss from equity investees	(67,000)	65,000	(806,000)
Interest accrued on receivable from business sold to affiliate	(37,000)
Distributions from equity investees	13,000	1,212,000	97,000
Write off of software development costs			433,000
Impairment of intangibles		300,000	300,000
Changes in:
Securities owned, at fair value	(82,000)	(151,000)	(5,000)
Receivable from affiliate	(76,000)
Receivable from brokers	317,000	818,000	(890,000)
Prepaid expenses and other assets	33,000	149,000	(73,000)
Accounts payable and accrued liabilities	(685,000)	445,000	(1,183,000)
Net cash used in operating activities	(8,694,000)	(2,944,000)	(2,014,000)
Cash Flows From Investing Activities:
Purchase of furniture, equipment and leasehold improvements	(154,000)	(520,000)	(262,000)
Distributions from equity investees	173,000	6,000
(Payment) collection of advances made to equity investees		(1,000)	24,000
Net cash provided by/ (used in) investing activities	19,000	(515,000)	(238,000)
Cash flows from financing activities:
Purchase of treasury shares		(19,000)	(13,000)
Net decrease in cash and cash equivalents	(8,675,000)	(3,478,000)	(2,265,000)
Cash and cash equivalents - beginning of year	15,424,000	18,902,000	21,167,000
Cash and cash equivalents - end of year	6,749,000	15,424,000	18,902,000
Supplemental Cash Flow Disclosures:
Income taxes paid (received), net		19,000	34,000
Siebert, Brandford, Shank Financial LLC and Subsidiary
Cash flows from operating activities:
Net loss	170,747
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of discount on obligation due affiliate	36,641
Depreciation and amortization	267,973
Changes in:
Accounts receivable	(1,031,467)
Due to/from broker	(2,514,399)
Securities owned, at fair value	0
Other assets	(54,533)
Payable to (receivable from) affiliates	76,056
Bank overdraft	(1,225,779)
Deferred rent	(72,788)
Accounts payable and accrued liabilities	741,040
Net cash used in operating activities	(3,606,509)
Cash Flows From Investing Activities:
Purchase of furniture, equipment and leasehold improvements	(89,364)
Cash flows from financing activities:
Distributions to members	(26,472)
Subordinated borrowings	9,000,000
Subordinated repayments	(5,000,000)
Net cash (used in) provided by financing activities	3,973,528
Net decrease in cash and cash equivalents	277,655
Cash and cash equivalents - beginning of year	19,787,407
Cash and cash equivalents - end of year	20,065,062
Supplemental Cash Flow Disclosures:
Income taxes paid (received), net	24,323
Interest paid	100,295
Non-cash investing and financing activities:
Note payable for purchase of business from affiliate	1,820,000
Intangible assets acquired related to business acquired from affiliate issuer relationships	(819,000)
Goodwill	(1,001,000)
Siebert, Brandford, Shank and Co LLC
Cash flows from operating activities:
Net loss		192,891	1,579,176
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of discount on obligation due affiliate
Depreciation and amortization		250,154	266,093
Changes in:
Accounts receivable		395,913	(739,538)
Due to/from broker		(2,328,918)	2,323,885
Securities owned, at fair value		11,264,998	(11,264,998)
Other assets		139,264	81,554
Payable to (receivable from) affiliates		36,929	(27,506)
Bank overdraft		1,225,779
Deferred rent		(9,740)	(54,848)
Accounts payable and accrued liabilities		(1,368,577)	(1,277,796)
Net cash used in operating activities		9,798,693	(9,113,978)
Cash Flows From Investing Activities:
Purchase of furniture, equipment and leasehold improvements		(47,759)	(63,381)
Cash flows from financing activities:
Distributions to members		(2,473,529)	(193,792)
Subordinated borrowings
Subordinated repayments			(6,000,000)
Net cash (used in) provided by financing activities		(2,473,529)	(6,193,792)
Net decrease in cash and cash equivalents		7,277,405	(15,371,151)
Cash and cash equivalents - beginning of year		12,510,002	27,881,153
Cash and cash equivalents - end of year		19,787,407	12,510,002
Supplemental Cash Flow Disclosures:
Income taxes paid (received), net		28,177	101,517
Interest paid		$ 48,000	$ 66,718