Segment Information - Schedule of Net Revenue and Operating Income (Loss) by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net revenue			$ 100
Operating income (loss) from continuing operations	(500)	(2,000)	(2,500)	(5,500)
Interest expense				(100)
Net losses from GBAM Fund activities		(200)		(700)
Other income (expense), net		100		400
Loss from continuing operations before income taxes	(500)	(2,100)	(2,500)	(5,900)
Operating Segments [Member]
Operating income (loss) from continuing operations		(900)	100	(2,700)
Operating Segments [Member] | Asset Management Business [Member]
Net revenue			100
Operating income (loss) from continuing operations		(900)	100	(2,700)
Corporate and Unallocated [Member]
Operating income (loss) from continuing operations	(500)	(1,100)	(2,500)	(2,700)
Restructuring and Other [Member]
Operating income (loss) from continuing operations			$ (100)	$ (100)