CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) (Unaudited) - USD ($) $ in Millions	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated (Deficit)	Treasury Stock
Balance at Dec. 31, 2019	$ (23.2)				$ (23.2)
Balance, shares at Dec. 31, 2019			7,300,000
Net income (loss)	(20.8)				(20.8)
Opening deferred tax liabilities under reverse recapitalization	(19.0)				(19.0)
Equity infusion from reverse recapitalization, net of transaction costs	175.7			$ 175.7
Equity infusion from reverse recapitalization, net of transaction costs, shares			21,911,359
Shares issued upon settlement of equity-linked incentive plan	3.1			3.1
Shares issued upon settlement of equity-linked incentive plan, shares			300,000
Share based compensation	3.2			3.2
Share based compensation, shares			390,000
Disgorgement of short swing profits	1.6			1.6
Repurchases of common stock	(5.9)					$ (5.9)
Repurchases of common stock, shares			(390,000)
Balance at Sep. 30, 2020	114.7			183.6	(63.0)	(5.9)
Balance, shares at Sep. 30, 2020			29,511,359
Balance at Jun. 30, 2020	114.2			180.4	(63.3)	(2.9)
Balance, shares at Jun. 30, 2020			29,511,359
Net income (loss)	0.3				0.3
Share based compensation	3.2			3.2
Share based compensation, shares			390,000
Repurchases of common stock	(3.0)					(3.0)
Repurchases of common stock, shares			(390,000)
Balance at Sep. 30, 2020	114.7			183.6	(63.0)	(5.9)
Balance, shares at Sep. 30, 2020			29,511,359
Balance at Dec. 31, 2020	156.9			216.2	(53.4)	(5.9)
Balance, shares at Dec. 31, 2020		1,200,000	30,018,502
Net income (loss)	(20.1)				(20.1)
Dividends on preferred stock	(1.8)				(1.8)
Share based compensation	0.9			0.9
Warrants exchanged into common stock, shares			2,279,874
Issuance of restricted stock units to employees, shares			65,000
Balance at Sep. 30, 2021	135.9			217.1	(75.3)	(5.9)
Balance, shares at Sep. 30, 2021		1,200,000	32,363,376
Balance at Jun. 30, 2021	136.0			216.7	(74.8)	(5.9)
Balance, shares at Jun. 30, 2021		1,200,000	32,363,376
Net income (loss)	0.2				0.2
Dividends on preferred stock	(0.7)				(0.7)
Share based compensation	0.4			0.4
Balance at Sep. 30, 2021	$ 135.9			$ 217.1	$ (75.3)	$ (5.9)
Balance, shares at Sep. 30, 2021		1,200,000	32,363,376