Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Net revenue
Operating expenses:
Selling, general and administrative	0.7	2.8	2.3	5.2
Restructuring and other				0.3
Total operating expenses	0.7	2.8	2.3	5.5
Operating loss from continuing operations	(0.7)	(2.8)	(2.3)	(5.5)
Other income (expense):
Interest expense	(0.1)	(0.2)	(0.2)	(1.9)
Gain on Chapter 11 reorganization				13.8
Bank Loan forgiveness				0.4
Other income (expense), net		0.4	0.2	0.4
Total other income (expense)	(0.1)	0.2		12.7
Income (loss) from continuing operations before income taxes	(0.8)	(2.6)	(2.3)	7.2
Income (loss) from continuing operations	(0.8)	(2.6)	(2.3)	7.2
Net income(loss) from continuing operations	(0.8)	(2.6)	(2.3)	7.2
Discontinued Operations:
Loss from discontinued operations, net of income taxes		(0.2)		(0.5)
Loss from discontinued businesses, net of income taxes		(0.2)		(0.5)
Net income (loss)	$ (0.8)	$ (2.8)	$ (2.3)	$ 6.7
Net income (loss) per common share — basic and diluted:
Continuing operations	$ (30.30)	$ (101.56)	$ (87.12)	$ 285.70
Discontinued operations		(7.81)		(19.83)
Net income (loss)	$ (30.30)	$ (109.37)	$ (87.12)	$ 265.87
Weighted average common shares outstanding:
Basic and diluted (thousands)	26,400	25,600	26,400	25,200