ACQUISITIONS (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended			5 Months Ended	7 Months Ended	8 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Jul. 31, 2013	Dec. 31, 2012
Revenues:
Revenues - Sale of goods									$ 9,859	$ 16,165	$ 18,312
Cost of goods sold									14,080	11,506	12,750
Selling, general and administrative expenses									44,453	36,382	39,834
Operating (loss) income	(3,669)	(1,253)	(1,056)	(1,258)	2,906	782	(1,935)	2,345	(7,431)	4,098	7,441
Gain on bargain purchase									0	0	1,366
(Loss) income before income taxes									(8,681)	1,280	6,276
Net (loss) income attributable to noncontrolling interest									6	(482)	819
Net (loss) income attributable to B. Riley Financial, Inc.	(2,822)	(868)	(777)	(1,334)	934	366	(1,531)	1,289	(5,801)	1,058	3,521
Shoon Trading Limited [Member]
Revenues:
Revenues - Sale of goods													6,202	10,206
Cost of goods sold												3,375	(3,566)	(5,475)
Selling, general and administrative expenses													(3,818)	(4,480)
Operating (loss) income													(1,182)	251
Other expenses													(94)	(251)
Gain on bargain purchase														1,366
(Loss) income before income taxes													(1,276)	1,366
Benefit (provision) for income taxes													319	(1)
Net (loss) income													(957)	1,365
Net (loss) income attributable to noncontrolling interest													(532)	819
Net (loss) income attributable to B. Riley Financial, Inc.												$ (102)	$ (425)	$ 546