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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Schedule of Loss Before Taxes, Domestic and Foreign

Our loss before income taxes is as follows (in thousands):

			Year Ended December 31,
			2023						2022						2021
U.S. loss before income taxes			$	(581,136)					$	(413,653)					$	(347,226)
Foreign loss before income taxes			(2,756)						(3,633)						(2,613)
Loss before income taxes			$	(583,892)					$	(417,286)					$	(349,839)

Schedule of Components of Income Tax Benefit (Provision)

Income tax benefit (expense) consists of the following (in thousands):

			Year Ended December 31,
			2023						2022						2021
Current:
Federal			$	—					$	—					$	—
State			26						(38)						(9)
Foreign			—						—						—
Total current			26						(38)						(9)
Deferred:
Federal			5						2						—
State			9						2						—
Foreign			—						—						—
Total deferred			14						4						—
Total income tax benefit (expense)			$	40					$	(34)					$	(9)

Schedule of Deferred Tax Assets and Liabilities

The components that comprise our net deferred tax liabilities consist of the following (in thousands):

			As of December 31,
			2023						2022
Deferred tax assets:
Net operating loss carryforwards			$	420,782					$	362,360
Section 174 R&E capitalization			87,721						50,571
Research and development credits			56,610						40,954
Interest expense			39,859						19,974
Stock-based compensation			22,554						20,927
Capital loss			16,192						—
Operating lease liabilities			11,605						12,986
Valuation discount			9,095						—
Investments			7,544						5,886
Amortization			3,715						3,969
Accrued compensation			3,262						3,398
Other accrued liabilities			2,944						1,640
Other			839						698
Total deferred tax assets			682,722						523,363
Deferred tax liabilities:
Debt discount			(23,365)						(16,527)
Operating lease right-of-use assets			(9,380)						(11,747)
Depreciation			(1,533)						(3,300)
Indefinite-lived intangible assets			(148)						(192)
Total deferred tax liabilities			(34,426)						(31,766)
Net deferred tax assets			648,296						491,597
Valuation allowance			(648,444)						(491,755)
Net deferred tax liabilities			$	(148)					$	(158)

Schedule of Reconciliation of Federal Statutory Income Tax Rate to Effective Income Tax Rate

A reconciliation of the federal statutory income tax rate to our effective income tax rate is as follows:

			Year Ended December 31,
			2023						2022						2021
Federal statutory tax rate			21.0		%				21.0		%				21.0		%
State income taxes, net of federal tax benefit			6.8		%				9.5		%				7.0		%
Change in fair value of warrants			(1.8)		%				0.5		%				—		%
Change in fair value of convertible notes			(1.3)		%				—		%				—		%
Investment loss			2.1		%				—		%				—		%
Other permanent items			—		%				(0.1)		%				(0.1)		%
Tax rate adjustment			1.4		%				(0.4)		%				1.5		%
Research and development credits			3.1		%				3.6		%				3.7		%
Stock-based compensation			(1.0)		%				(0.5)		%				0.5		%
Section 162(m) limitation			(0.4)		%				(2.1)		%				—		%
Other			0.3		%				1.5		%				(0.9)		%
Valuation allowance			(30.2)		%				(33.0)		%				(32.7)		%
Effective income tax rate			—		%				—		%				—		%

Schedule of Changes to Unrecognized Tax Benefits

A summary of changes to the amount of unrecognized tax benefits is as follows (in thousands):

			Year Ended December 31,
			2023						2022						2021
Unrecognized tax benefits, beginning of year			$	16,252					$	13,504					$	20,413
Additions based on tax positions related to the current year			18,976						1,710						536
Additions based on tax positions related to prior years			242						1,038						—
Reductions for tax positions of prior years			—						—						(7,445)
Unrecognized tax benefits, end of year			$	35,470					$	16,252					$	13,504

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