Net Loss per Share

6 Months Ended

Jun. 30, 2022

15. Net Loss per Share

We compute net loss per share of common stock using the treasury stock method. 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	)

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

The shares underlying the conversion option in the Convertible Senior Notes were not considered in the calculation of diluted net loss per share as the effect would have been anti-dilutive. Based on the initial conversion price, the entire outstanding principal amount of the Convertible Senior Notes as of June 30, 2022 would have been convertible into approximately 4.3 million shares of our common stock. Since we expect to settle the principal amount of the Convertible Senior Notes in cash, we use the treasury stock method for calculating any potential dilutive effect on diluted net income per share, if applicable. As a result, only the amount by which the conversion value exceeds the aggregate principal amount of the Convertible Senior Notes (the “conversion spread”) is considered in the diluted earnings per share computation. The conversion spread has a dilutive impact on diluted net income per share when the average market price of our common stock for a given period exceeds the initial conversion price of $132.20 per share for the Convertible Senior Notes. We excluded the potentially dilutive effect of the conversion spread of the Convertible Senior Notes as the average market price of our common stock during the three and six months ended June 30, 2022 was less than the conversion price of the Convertible Senior Notes. In connection with the issuance of the Convertible Senior Notes, we entered into Capped Calls, which were not included for purposes of calculating the number of diluted shares outstanding, as their effect would have been anti-dilutive.