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, 2023		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
Ending balance at Mar. 31, 2024	676.4	$ 0.0	1,829.5	(1,143.9)	(9.2)
Beginning balance (in shares) at Dec. 31, 2023		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]
Net loss	(104.5)
Ending balance (in shares) at Jun. 30, 2024		71,002,862
Ending balance at Jun. 30, 2024	635.2	$ 0.0	1,844.9	(1,201.1)	(8.6)
Beginning balance (in shares) at Mar. 31, 2024		70,478,088
Beginning balance at Mar. 31, 2024	676.4	$ 0.0	1,829.5	(1,143.9)	(9.2)
Increase (Decrease) in Stockholders' Deficit [Roll Forward]
Exercise of stock options and distribution of restricted stock units (in shares)		343,693
Exercise of stock options and distribution of restricted stock units	0.0		0.0
Exercise of warrant shares (in shares)		181,081
Stock-based compensation	15.4		15.4
Net loss	(57.2)			(57.2)
Other comprehensive income (loss)	0.6				0.6
Ending balance (in shares) at Jun. 30, 2024		71,002,862
Ending balance at Jun. 30, 2024	$ 635.2	$ 0.0	1,844.9	(1,201.1)	(8.6)
Beginning balance (in shares) at Dec. 31, 2024	72,720,866	72,720,866
Beginning balance at Dec. 31, 2024	$ 593.4	$ 0.0	1,898.3	(1,298.8)	(6.1)
Increase (Decrease) in Stockholders' Deficit [Roll Forward]
Exercise of stock options and distribution of restricted stock units (in shares)		492,005
Exercise of stock options and distribution of restricted stock units	1.5		1.5
Stock-based compensation	10.3		10.3
Net loss	(62.4)			(62.4)
Other comprehensive income (loss)	2.7				2.7
Ending balance (in shares) at Mar. 31, 2025		73,212,871
Ending balance at Mar. 31, 2025	$ 545.5	$ 0.0	1,910.1	(1,361.2)	(3.4)
Beginning balance (in shares) at Dec. 31, 2024	72,720,866	72,720,866
Beginning balance at Dec. 31, 2024	$ 593.4	$ 0.0	1,898.3	(1,298.8)	(6.1)
Increase (Decrease) in Stockholders' Deficit [Roll Forward]
Net loss	$ (106.3)
Ending balance (in shares) at Jun. 30, 2025	73,819,710	73,819,710
Ending balance at Jun. 30, 2025	$ 527.1	$ 0.0	1,928.0	(1,405.1)	4.2
Beginning balance (in shares) at Mar. 31, 2025		73,212,871
Beginning balance at Mar. 31, 2025	545.5	$ 0.0	1,910.1	(1,361.2)	(3.4)
Increase (Decrease) in Stockholders' Deficit [Roll Forward]
Exercise of stock options and distribution of restricted stock units (in shares)		606,839
Exercise of stock options and distribution of restricted stock units	2.5		2.5
Stock-based compensation	15.4		15.4
Net loss	(43.9)			(43.9)
Other comprehensive income (loss)	$ 7.6				7.6
Ending balance (in shares) at Jun. 30, 2025	73,819,710	73,819,710
Ending balance at Jun. 30, 2025	$ 527.1	$ 0.0	$ 1,928.0	$ (1,405.1)	$ 4.2