Schedule of Net Revenue, Operating Loss from Continuing Operations and Assets by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Total net revenue		$ 0.4		$ 0.7
Total segment operating loss	(0.5)	(1.9)	(3.0)	(4.9)
Corporate and unallocated	(2.8)	(0.7)	(3.5)	(1.5)
Total operating loss	(3.3)	(2.6)	(6.5)	(6.4)
Interest expense	(0.2)	(0.7)	(1.9)	(1.8)
Realized loss on investments		(0.1)	(0.2)	(1.8)
Gain on Chapter 11 reorganization			13.8
Bank Loan forgiveness			0.4
Defined benefit plan adjustment				(8.5)
Other income (expense), net	0.4	(0.1)	0.4
Income (loss) from operations before income taxes	(3.1)	(3.5)	6.0	(18.5)
Total segment assets	21.5		21.5		$ 24.2
Corporate and unallocated	1.6		1.6		1.2
Total consolidated assets	23.1		23.1		25.4
Asset Management Income [Member]
Total net revenue		0.1		0.1
Total segment operating loss		(1.6)	(2.0)	(3.9)
Total segment assets	13.2		13.2		15.8
Sports Technology Platform [Member]
Total net revenue		0.3		0.6
Total segment operating loss	(0.5)	$ (0.3)	(1.0)	$ (1.0)
Total segment assets	$ 8.3		$ 8.3		$ 8.4