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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Component of Consolidated (Loss) Income Before Provision for Income Taxes

Consolidated income (loss) before provision for income taxes consisted of the following (in thousands):

		Year Ended December 31,
		2021				2020				2019
U.S.		$	75,954			$	(76,324	)		$	(154,605	)
Non U.S.			1,567				1,084				2,005
Total		$	77,521			$	(75,240	)		$	(152,600	)

Difference Between Consolidated Income Tax Benefit and Amount Computed by Federal Statutory Income Tax Rate

		Year Ended December 31,
		2021				2020				2019
Income tax provision (benefit) at federal statutory rate		$	16,397			$	(15,756	)		$	(32,046	)
State tax			3,576				(3,194	)			(3,153	)
Business credits			(982	)			(773	)			(1,757	)
Uncertain tax positions			424				193				5,426
Deferred compensation charges			131				809				4,600
Change in valuation allowance			(86,847	)			19,009				22,715
Section 162(m) limitation			1,241				473				2,439
Mark-to-market of warrants			10,364				(866	)			1,575
Net operating loss and tax credit limitation			56,459				-				-
Other			45				105				201
Total income tax expense		$	808			$	-			$	-

Component of Deferred Tax Assets and Liabilities

Deferred tax assets and liabilities consisted of the following (in thousands):

		December 31,
		2021				2020
Deferred tax assets:
Net operating loss carryforwards		$	155,503			$	224,161
Research credit carryforwards			12,870				28,578
Lease liability			8,515				-
Stock compensation			5,798				-
Accruals and reserves			5,792				17,264
Other			212				3,250
Total deferred tax assets			188,690				273,253
Less valuation allowance			(179,253	)			(266,100	)
Net deferred tax assets			9,437				7,153
Deferred tax liabilities:
Fixed assets			(3,283	)			(275	)
Operating lease right-of-use assets			(6,124	)			(6,878	)
Other			(30	)			-
Total deferred tax liabilities			(9,437	)			(7,153	)
Net deferred tax assets		$	-			$	-

Schedule of Unrecognized Tax Benefits

The following table summarizes the activity related to our unrecognized tax benefits:

Balance at December 31, 2020		$	(10,565		)
Tax positions related to the current year
Additions			(308		)
Reductions			-
Tax positions related to the prior year
Additions			-
Reductions			5,258
Settlements			-
Lapses in statute			-
Balance at December 31, 2021		$	(5,615		)

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure of income before income tax between domestic and foreign jurisdictions.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
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Tabular disclosure of the change in unrecognized tax benefits.

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