NET CAPITAL REQUIREMENTS (Details Narrative) $ in Thousands	Jun. 30, 2017 USD ($)
FBR & Co. ("FBR") [Member]
Net capital	$ 37,755
Excess capital	36,755
MLV & Co. [Member]
Net capital	411
Excess capital	311
Maximum [Member] \| FBR & Co. ("FBR") [Member]
Net capital	1,000
Maximum [Member] \| MLV & Co. [Member]
Net capital	100
B. Riley & Co., LLC [Member]
Net capital	9,082
Excess capital	8,740
B. Riley & Co., LLC [Member] \| Maximum [Member]
Net capital	$ 342

Net capital is equal to the net worth of the broker dealer, less certain items such as exchange memberships, carrying value of securities not readily marketable, haircuts on marketable securities in proprietary accounts, furniture and equipment and other illiquid assets as defined.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Rule 15c3-1
-Number 240
-Section 15c3-1

Name:	us-gaap_NetCapital
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant