Segment Information - Schedule of Net Revenue and Operating Income (Loss) by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net revenue	$ 100		$ 100
Operating income (loss) from continuing operations	(1,200)	(1,800)	(2,000)	(3,500)
Interest expense				(100)
Net gain (loss) from GBAM Fund activities		(400)		(500)
Other income (expense), net		100		300
Loss from continuing operations before income taxes	(1,100)	(2,100)	(2,000)	(3,800)
Operating Segments [Member]
Operating income (loss) from continuing operations	100	(900)	100	(1,800)
Operating Segments [Member] | Asset Management Business [Member]
Net revenue	100		100
Operating income (loss) from continuing operations	100	(900)	100	(1,800)
Corporate and Unallocated [Member]
Operating income (loss) from continuing operations	(1,200)	(800)	(2,000)	(1,600)
Restructuring And Other [Member]
Operating income (loss) from continuing operations		$ (100)	$ (100)	$ (100)