Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Schedule of Loss Before Provision for Income Taxes

Income (loss) before income taxes included the following (in millions):

	Year Ended December 31,
	2022			2021		2020
Domestic	$	(267	)	$	54	$	(123	)
Foreign		1			1		-
Income (loss) before income tax	$	(266	)	$	55	$	(123	)

Schedule of Components of Provision for Income Taxes

The provision for income taxes included the following (in millions):

	Year Ended December 31,
	2022		2021		2020
Current
Federal	$	-	$	1	$	-
State		1		1		-
Total income tax expense	$	1	$	2	$	-

Schedule of Effective Tax Rate of Provision for Income Taxes Differs from Federal Statutory Rate

The reconciliation between the federal statutory income tax rate and our effective tax rate was as follows:

	Year Ended December 31,
	2022				2021				2020
Federal statutory income tax rate		21.0		%		21.0		%		21.0		%
State taxes, net of federal benefit		(0.1	)			0.8				-
Equity investment		0.9				(4.1	)			4.2
Research and development credits		3.1				(11.9	)			3.1
Change in valuation allowance		(24.5	)			(2.6	)			(27.4	)
Stock based compensation		0.1				(0.8	)			(0.2	)
Non-deductible expenses and other		(0.6	)			0.9				(0.7	)
Provision for income taxes		(0.1	)	%		3.3		%		0.0		%

Schedule of Significant Components of Deferred Tax Assets for Federal and State Income Taxes

Significant components of our deferred tax assets and liabilities were as follows (in millions):

	Year Ended December 31,
	2022			2021
Deferred tax assets:
Federal and state net operating loss carryforwards	$	24		$	24
Research and development credits carryforwards		22			13
Stock-based compensation		16			10
Depreciation and amortization		6			6
Deferred revenue		19			24
Lease liability		25			25
Capitalized research and development costs		53			-
Other		7			4
Total deferred tax assets		172			106
Deferred tax liabilities:
Right-of-use assets		(22	)		(23	)
Total deferred tax liabilities		(22	)		(23	)
Less valuation allowance		(150	)		(83	)
Net deferred tax assets (liabilities)	$	-		$	-

Summary of Activity Related to Unrecognized Tax Benefits

The following table summarizes the activity related to our unrecognized tax benefits (in millions):

	Year Ended December 31,
	2022		2021
Beginning balance	$	5	$	3
Additions for tax positions taken in current year		3		2
Ending balance	$	8	$	5