Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues:
Services and fees	$ 64,395	$ 20,261	$ 117,213	$ 40,205
Interest income - Securities lending	2,218		2,218
Sale of goods	63		142	2
Total revenues	66,676	20,261	119,573	40,207
Operating expenses:
Direct cost of services	18,485	5,560	36,086	12,243
Cost of goods sold	130		189	2
Selling, general and administrative expenses	37,722	14,521	61,874	26,117
Restructuring charge	6,214		6,588
Interest expense - Securities lending	1,565		1,565
Total operating expenses	64,116	20,081	106,302	38,362
Operating income	2,560	180	13,271	1,845
Other income (expense):
Interest income	150	3	282	6
Interest expense	(1,894)	(275)	(2,685)	(407)
Income (loss) before income taxes	816	(92)	10,868	1,444
Benefit (provision) for income taxes	2,547	65	6,396	(101)
Net income (loss)	3,363	(27)	17,264	1,343
Net income (loss) attributable to noncontrolling interests	83	74	(37)	1,196
Net income (loss) attributable to B. Riley Financial, Inc.	$ 3,280	$ (101)	$ 17,301	$ 147
Basic income (loss) per share (in dollars per share)	$ 0.15	$ (0.01)	$ 0.85	$ 0.01
Diluted income (loss) per share (in dollars per share)	0.15	(0.01)	0.82	0.01
Cash dividends per share (in dollars per share)	$ 0.16		$ 0.42
Weighted average basic shares outstanding (in shares)	21,216,829	17,935,254	20,311,231	17,212,716
Weighted average diluted shares outstanding (in shares)	22,119,055	17,935,254	20,984,757	17,547,073