Schedule of Net Revenue, Operating Loss from Continuing Operations and Assets by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Total net revenue		$ 0.3		$ 0.3
Total segment operating loss	(1.2)	(1.4)	(2.5)	(3.0)
Corporate and unallocated	(0.6)	(0.3)	(0.7)	(0.8)
Total operating loss	(1.8)	(1.7)	(3.2)	(3.8)
Interest expense	(0.8)	(0.6)	(1.7)	(1.1)
Realized income (loss) on investments	(0.2)	0.5	(0.2)	(1.7)
Gain on Chapter 11 reorganization	13.8		13.8
Bank Loan forgiveness	0.4		0.4
Defined benefit plan adjustment				(8.5)
Other income, net				0.1
Income (loss) from operations before income taxes	11.4	(1.8)	9.1	(15.0)
Total segment assets	22.0		22.0		$ 24.2
Corporate and unallocated	0.2		0.2		1.2
Total consolidated assets	22.2		22.2		25.4
Asset Management Income [Member]
Total net revenue
Total segment operating loss	(0.8)	(1.2)	(2.0)	(2.3)
Total segment assets	13.7		13.7		15.8
Sports Technology Platform [Member]
Total net revenue		0.3		0.3
Total segment operating loss	(0.4)	$ (0.2)	(0.5)	$ (0.7)
Total segment assets	$ 8.3		$ 8.3		$ 8.4