Condensed Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Deficit) [Member]	Accumulated Other Comprehensive Loss [Member]	Noncontrolling Interest [Member]	Total
Balance at Beginning at Dec. 31, 2015		$ 2	$ 116,799	$ (6,305)	$ (1,058)	$ (118)	$ 109,320
Balance at Beginning (in shares) at Dec. 31, 2015		16,448,119
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for acquisition of MK Capital, LLC - contigent equity consideration on February 2, 2016
Issuance of common stock for acquisition of MK Capital, LLC - contigent equity consideration on February 2, 2016 (in shares)		166,667
Vesting of restricted stock, net of shares withheld for employer taxes
Vesting of restricted stock, net of shares withheld for employer taxes (in shares)		7,306
Offering of common stock, net of offering expenses			22,759				22,759
Offering of common stock, net of offering expenses (in shares)		2,420,980
Share based payments			997				997
Net income				147		1,196	1,343
Foreign currency translation adjustment					(17)		(17)
Balance at End at Jun. 30, 2016		$ 2	140,555	(6,158)	(1,075)	1,078	134,402
Balance at End (in shares) at Jun. 30, 2016		19,043,072
Balance at Beginning at Dec. 31, 2016		$ 2	141,170	9,887	(1,712)	1,045	150,392
Balance at Beginning (in shares) at Dec. 31, 2016		19,140,342
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for acquisition of MK Capital, LLC - contigent equity consideration on February 2, 2016			1,151				1,151
Issuance of common stock for acquisition of MK Capital, LLC - contigent equity consideration on February 2, 2016 (in shares)		166,666
Issuance of common stock for acquisition of Dialectic general partner interests on April 13, 2017			1,952				1,952
Issuance of common stock for acquisition of Dialectic general partner interests on April 13, 2017 (in shares)		158,484
Issuance of common stock for acquisition of FBR & Co. on June 1, 2017			73,472				73,472
Issuance of common stock for acquisition of FBR & Co. on June 1, 2017 (in shares)		4,779,354
Vesting of restricted stock, net of shares withheld for employer taxes			(1,057)				(1,057)
Vesting of restricted stock, net of shares withheld for employer taxes (in shares)		132,960
Share based payments			3,940				3,940
Dividends paid				(8,134)			(8,134)
Net income				17,301		16	17,264
Foreign currency translation adjustment					1,046		1,046
Balance at End at Jun. 30, 2017		$ 2	$ 220,628	$ 19,054	$ (666)	$ 1,061	$ 240,079
Balance at End (in shares) at Jun. 30, 2017		24,377,806