CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Series A convertible preferred stock	Series A convertible preferred stock Preferred Stock	Series A convertible preferred stock Accumulated Deficit	Series B perpetual preferred stock	Series B perpetual preferred stock Preferred Stock	Series B perpetual preferred stock Accumulated Deficit
Balance (in Value) at Dec. 31, 2020	$ 138.8		$ 401.6	$ (327.8)	$ 0.0		$ 65.0
Balance (in Shares) at Dec. 31, 2020		65,023,174					650,000
Exercise of stock options (in shares)		15,754
Exercise of stock options (in Value)	0.5		0.5
Exercise of warrants (in shares)		5
Exercise of warrants (value)			0.0
Vesting of stock awards (in Value)	$ (1.9)		(1.9)
Vesting of stock awards (in Shares)		308,554
Series A convertible preferred stock dividend						$ (5.0)		$ (5.0)
Common stock repurchased and retired during period (in shares)	3,000,000	(3,000,000)
Common stock repurchased and retired during period	$ (20.4)		(20.4)
Stock-based compensation expense	8.0		8.0
Foreign currency translation adjustments	0.0
Net income	56.0			56.0
Balance (in Value) at Dec. 31, 2021	176.0		387.8	(276.8)			$ 65.0
Balance (in Shares) at Dec. 31, 2021		62,489,278					650,000
Exercise of stock options (in shares)		91,425
Exercise of stock options (in Value)	0.8		0.8
Exercise of warrants (in shares)		817,648
Exercise of warrants (value)	9.4		9.4
Vesting of stock awards (in Value)	(1.1)		(1.1)
Vesting of stock awards (in Shares)		365,969
Series B perpetual preferred stock issuance (in shares)										67,597
Series B perpetual preferred stock dividend (in values)									$ 67.6	$ 67.6
Series A convertible preferred stock dividend						(5.0)		(5.0)	(0.7)		$ (0.7)
Stock Issued During Period, Value, New Issues									67.6	67.6
Common stock repurchased and retired during period (in shares)		(18,736,279)
Common stock repurchased and retired during period	(112.5)		(112.5)
Stock-based compensation expense	8.7		8.7
Foreign currency translation adjustments	(0.4)				(0.4)
Net income	50.2			50.2
Balance (in Value) at Dec. 31, 2022	193.0		293.1	(232.3)	(0.4)		$ 65.0			$ 67.6
Balance (in Shares) at Dec. 31, 2022		45,028,041					650,000			67,597
Exercise of stock options (in shares)		83,000
Exercise of stock options (in Value)	0.1		0.1
Vesting of stock awards (in Value)	(4.4)		(4.4)
Vesting of stock awards (in Shares)		1,455,501
Preferred stock redemption (in value)									(20.0)
Series B perpetual preferred stock issuance (in shares)										(20,000)
Series B perpetual preferred stock dividend (in values)										$ (20.0)
Series A convertible preferred stock dividend						$ (5.0)		$ (5.0)	$ (4.3)		$ (4.3)
Stock Issued During Period, Value, New Issues										(20.0)
Stock-based compensation expense	9.2		9.2
Foreign currency translation adjustments	0.5				0.5
Net income	(17.7)			(17.7)
Balance (in Value) at Dec. 31, 2023	$ 151.4		$ 298.0	$ (259.3)	$ 0.1		$ 65.0			$ 47.6
Balance (in Shares) at Dec. 31, 2023		46,566,542					650,000			47,597