Segment Information - Schedule of Net Revenue and Operating Income (Loss) by Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net revenue		$ 100
Operating income (loss) from continuing operations	(900)	(1,700)
Interest expense		(100)
Net gain (loss) from GBAM Fund activities		(100)
Other income (expense), net		200
Loss from continuing operations before income taxes	(900)	(1,700)
Operating Segments [Member]
Operating income (loss) from continuing operations	0	(900)
Operating Segments [Member] | Asset Management Business [Member]
Net revenue		100
Operating income (loss) from continuing operations	0	(900)
Corporate and Unallocated [Member]
Operating income (loss) from continuing operations	(800)	(800)
Segment Reconciling Items [Member]
Restructuring and other	$ (100)