Net Loss per Share (Tables)

6 Months Ended

Jun. 30, 2022

Earnings Per Share [Abstract]

Schedule of Computations of Basic and Diluted Net Loss per Share

The basic and diluted net loss per share computations were calculated as follows:

	Three Months Ended June 30,						Six Months Ended June 30,
	2022			2021			2022			2021
	(Dollars in millions, except share and per share data)
Numerator:
Net loss	$	(19.8	)	$	(25.8	)	$	(47.2	)	$	(45.0	)
Denominator:
Weighted-average shares outstanding - basic		152,752,369			149,293,833			152,439,996			149,006,538
Effect of dilutive equity instruments		—			—			—			—
Weighted-average shares outstanding - diluted		152,752,369			149,293,833			152,439,996			149,006,538
Net loss per share - basic	$	(0.13	)	$	(0.17	)	$	(0.31	)	$	(0.30	)
Net loss per share - diluted	$	(0.13	)	$	(0.17	)	$	(0.31	)	$	(0.30	)

Schedule of Potentially Dilutive Weighted Average Shares Excluded from Calculation of Diluted Net Loss per Share

The following potentially dilutive weighted-average shares were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
Stock options		5,699,807		5,542,424		5,813,488		5,496,018
Restricted stock units		2,097,835		458,018		1,235,150		500,064
Performance stock units		1,439,481		729,104		1,340,950		667,903