Accounting for Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2022

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Share-based Compensation Expense

The following table reflects the impact of total compensation expense related to stock-based equity plans on the reported operating results for the respective periods (in millions):

	Three Months Ended
	March 31,
	2022			2021
Effect on income before income taxes	$	(5	)	$	(8	)
Effect on net loss	$	(4	)	$	(6	)

Schedule of Share-based Payment Awards, Stock Options, Valuation Assumptions

The fair value of stock options was estimated using the Black Scholes option pricing model with the following assumptions and weighted-average fair values during the three months ended March 31, 2022 and 2021:

	Three Months Ended March 31,
	2022		2021
Expected volatility	84.3% - 87.5%		84.3% - 88.9%
Expected dividends		—		—
Expected term	3 - 6 years		3 - 6 years
Risk-free interest rate	1.5% - 1.6%		0.3% - 0.9%

Schedule of Share-based Compensation, Stock Options, Activity

Options outstanding and exercisable under the 2009 Plan as of March 31, 2022, and changes during the three-month period following December 31, 2021, was as follows (in millions, except share and per share data):

						Weighted-	Aggregate
				Weighted-		Average	Intrinsic
				Average		Remaining	Value as of
				Exercise		Contractual	March 31,
	Shares			Price		Term	2022
Outstanding at December 31, 2021		2,301,753		$	6.77
Granted		760,000			10.18
Exercised		(56,500	)		4.97
Forfeited and cancelled		(151,002	)		14.67
Outstanding at March 31, 2022		2,854,251		$	7.30	8.5 years	$	13
Exercisable at March 31, 2022		1,316,912		$	5.64	7.7 years	$	8

Schedule of Share-based Compensation, Restricted Stock, Activity

Restricted stock outstanding under the 2009 Plan as of March 31, 2022, and changes during the three-month period following December 31, 2021, was as follows:

				Weighted-
				Average Grant
	Shares			Date Fair Value
Unvested at December 31, 2021		4,995,314		$	6.30
Granted		3,179,000			9.05
Vested		(2,516,247	)		5.62
Forfeited		(30,000	)		6.87
Unvested at March 31, 2022		5,628,067			8.61

Schedule of Share-based Compensation, Restricted Stock Units, Activity

RSUs outstanding under the 2009 Plan as of March 31, 2022, and changes during the three-month period following December 31, 2021, was as follows:

				Weighted-
				Average Grant
	Shares			Date Fair Value
Unvested at December 31, 2021		486,598		$	6.17
Granted		159,138			10.18
Vested		(151,058	)		5.63
Forfeited		—			—
Unvested at March 31, 2022		494,678			7.63