Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

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

	Year Ended December 31,
	2022		2021		2020
Current:
U.S.—Federal	$	—	$	—	$	—
U.S.—State	362		26		51
Foreign	73		1,255		125
Deferred:
U.S.—Federal	236		(223)		(20,509)
U.S.—State	39		(37)		(387)
Total	$	710	$	1,021	$	(20,720)

Schedule of Effective Income Tax Rate Reconciliation

Income tax expense was different from the amounts computed by applying U.S. Federal income tax rate to pretax income as a result of the following:

	Year Ended December 31,
	2022		2021		2020
Federal statutory rate	21.0	%	21.0	%	21.0	%
State income taxes, net of federal benefit	0.1	%	—	%	0.1	%
Foreign taxes	—	%	(1.6)	%	—	%
Change in valuation allowance related to current activity	(21.3)	%	(20.1)	%	(14.0)	%
Permanent items	0.4	%	(0.6)	%	(2.3)	%
Actual income tax rate	0.2	%	(1.3)	%	4.8	%

Schedule of Deferred Tax Assets and Liabilities

Deferred tax assets (liabilities) are comprised of the following (in thousands):

	December 31,
	2022		2021
Deferred tax assets:
Net operating loss	$	308,457	$	424,112
Intangible assets	830		1,912
Environmental credit obligations	71,424		40,097
Other	4,099		16,137
Total deferred tax assets	384,810		482,258
Valuation allowance	(330,456)		(421,387)
Net deferred tax assets	54,354		60,871
Deferred tax liabilities:
Inventory	5,891		9,820
Property and equipment	54,124		56,436
Total deferred tax liabilities	60,015		66,256
Total deferred tax liability, net	$	(5,661)	$	(5,385)