CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive (Loss) Income
Beginning balance (in shares) at Dec. 31, 2022		69,275,030
Beginning balance at Dec. 31, 2022	$ 866.8	$ 0.0	$ 1,754.1	$ (859.7)	$ (27.6)
Increase (Decrease) in Stockholders' Deficit [Roll Forward]
Exercise of stock options and distribution of restricted stock units (in shares)		174,318
Exercise of stock options and distribution of restricted stock units	0.1		0.1
Stock-based compensation	15.4		15.4
Net loss	(65.8)			(65.8)
Other comprehensive income (loss)	5.3				5.3
Ending balance (in shares) at Mar. 31, 2023		69,449,348
Ending balance at Mar. 31, 2023	$ 821.8	$ 0.0	1,769.6	(925.5)	(22.3)
Beginning balance (in shares) at Dec. 31, 2023	70,163,703	70,163,703
Beginning balance at Dec. 31, 2023	$ 708.9	$ 0.0	1,814.5	(1,096.6)	(9.0)
Increase (Decrease) in Stockholders' Deficit [Roll Forward]
Exercise of stock options and distribution of restricted stock units (in shares)		314,385
Exercise of stock options and distribution of restricted stock units	0.1		0.1
Stock-based compensation	14.9		14.9
Net loss	(47.3)			(47.3)
Other comprehensive income (loss)	$ (0.2)				(0.2)
Ending balance (in shares) at Mar. 31, 2024	70,478,088	70,478,088
Ending balance at Mar. 31, 2024	$ 676.4	$ 0.0	$ 1,829.5	$ (1,143.9)	$ (9.2)