Condensed Consolidated Statements of Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Preferred Stock	Common stocks [Member]	Additional Paid-In Capital	Retained Earnings (Deficit)	Accumulated Other Comprehensive Loss	Noncontrolling Interest	Total
Begining Balance, Shares at Dec. 31, 2013		1,500,107
Begining Balance, Amount at Dec. 31, 2013			$ 3,086	$ (6,611)	$ (638)	$ 12	$ (4,151)
Issuance of common stock on June 5, 2014 for cash, net of issuance costs of $215, Shares		10,289,300
Issuance of common stock on June 5, 2014 for cash, net of issuance costs of $215, Amount		$ 1	51,232				51,233
Foregiveness of long-term debt on June 5, 2014 from the former Great American Group Members			18,759				18,759
Issuance of common stock for acquisition of B. Riley & Co., Inc. on June 18, 2014, Shares		4,191,512
Issuance of common stock for acquisition of B. Riley & Co., Inc. on June 18, 2014, Amount		$ 1	26,406				26,407
B. Riley Financial, Inc. common stock owned by B. Riley & Co., Inc. - cancelled upon acquisition, Shares		(3,437)
B. Riley Financial, Inc. common stock owned by B. Riley & Co., Inc. - cancelled upon acquisition, Amount			(29)				(29)
Net (loss) income				(2,111)		134	(1,977)
Foreign currency translation adjustment					(20)		(20)
Ending Balance, Shares at Jun. 30, 2014		15,977,482
Ending Balance, Amount at Jun. 30, 2014		$ 2	99,454	(8,722)	(658)	146	90,222
Begining Balance, Shares at Dec. 31, 2014		15,968,607
Begining Balance, Amount at Dec. 31, 2014		$ 2	110,598	(12,891)	(648)	18	97,079
Issuance of common stock for acquisition of MK Capital, LLC and contigent equity consideration, Shares		333,333
Issuance of common stock for acquisition of MK Capital, LLC and contigent equity consideration, Amount			$ 4,657				$ 4,657
Issuance of common stock, Shares		$ 3,296
Issuance of common stock, Amount			35				35
Share based payments			$ 381				$ 381
Dividends paid				(978)			(978)
Net (loss) income				11,346		659	12,005
Foreign currency translation adjustment					(8)		(8)
Ending Balance, Shares at Jun. 30, 2015		16,305,236
Ending Balance, Amount at Jun. 30, 2015		$ 2	$ 115,671	$ (2,523)	$ (656)	$ 677	$ 113,171