Segment Information - Schedule of Net Revenue, Operating Loss from Continuing Operations and Assets by Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Total net revenue
Total segment operating loss	(1,300)	(1,600)
Corporate and unallocated	(100)	(500)
Total operating loss	(1,400)	(2,100)
Interest expense	(900)	(500)
Realized losses on investments		(2,200)
Defined benefit plan adjustment		(8,500)
Other income, net		100
Loss from operations before income taxes	(2,300)	(13,200)
Total segment assets	23,400		$ 24,200
Corporate and unallocated	200		1,200
Total consolidated assets	23,600		25,400
Asset Management Business [Member]
Total net revenue
Total segment operating loss	(1,200)	(1,100)
Total segment assets	14,900		15,800
Sports Technology Platform [Member]
Total net revenue
Total segment operating loss	(100)	$ (500)
Total segment assets	$ 8,500		$ 8,400