CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
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	(172.2)
Ending balance (in shares) at Sep. 30, 2024		71,378,678
Ending balance at Sep. 30, 2024	593.0	$ 0.0	1,861.9	(1,268.8)	(0.1)
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 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)
Increase (Decrease) in Stockholders' Deficit [Roll Forward]
Exercise of stock options and distribution of restricted stock units (in shares)		375,816
Exercise of stock options and distribution of restricted stock units	0.1		0.1
Stock-based compensation	16.9		16.9
Net loss	(67.7)			(67.7)
Other comprehensive income (loss)	8.5				8.5
Ending balance (in shares) at Sep. 30, 2024		71,378,678
Ending balance at Sep. 30, 2024	$ 593.0	$ 0.0	1,861.9	(1,268.8)	(0.1)
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	$ (143.8)
Ending balance (in shares) at Sep. 30, 2025	74,665,921	74,665,921
Ending balance at Sep. 30, 2025	$ 516.2	$ 0.0	1,953.6	(1,442.6)	5.2
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
Ending balance at Jun. 30, 2025	527.1	$ 0.0	1,928.0	(1,405.1)	4.2
Increase (Decrease) in Stockholders' Deficit [Roll Forward]
Exercise of stock options and distribution of restricted stock units (in shares)		846,211
Exercise of stock options and distribution of restricted stock units	8.5		8.5
Stock-based compensation	17.1		17.1
Net loss	(37.5)			(37.5)
Other comprehensive income (loss)	$ 1.0				1.0
Ending balance (in shares) at Sep. 30, 2025	74,665,921	74,665,921
Ending balance at Sep. 30, 2025	$ 516.2	$ 0.0	$ 1,953.6	$ (1,442.6)	$ 5.2