Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Net revenue	$ 0.1
Operating expenses:
Selling, general and administrative	1.1	0.8
Total operating expenses	1.1	0.8
Operating loss from operations	(1.0)	(0.8)
Other income (expense):
Interest expense	(0.1)	(0.1)
Other income, net		0.1
Total other expense	(0.1)
Loss from operations before income taxes	(1.1)	(0.8)
Net loss	$ (1.1)	$ (0.8)
Net loss per common share — basic and diluted:	$ (41.67)	$ (30.30)
Weighted average common shares outstanding:
Basic and diluted (thousands)	26,400	26,400