Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of Deferred Tax Assets and Liabilities

Deferred income taxes reflect the net effect of temporary differences between the financial reporting carrying amounts of assets and liabilities and income tax carrying amounts of assets and liabilities. The components of the Company’s deferred tax assets and liabilities, all of which are long-term, are as follows (in thousands):

	December 31,
	2021			2020
Deferred tax assets:
Net operating loss carryforwards	$	74,167		$	72,509
Tax credit carryforwards		37,866			37,901
Equipment, furnishings and other		4,174			4,174
Total deferred tax assets		116,207			114,584
Deferred tax liabilities		—			—
Net deferred tax assets		116,207			114,584
Valuation allowance		(116,207	)		(114,584	)
	$	—		$	—

Schedule of Effective Income Tax Rate Reconciliation

The provision for income taxes differs from the provision computed by applying the Federal statutory rate to net loss before income taxes as follows (in thousands):

	Years ended December 31,
	2021			2020
Federal benefit at statutory rate	$	(2,745	)	$	(1,407	)
State income taxes, net of Federal taxes		(913	)		(592	)
State credits		—			—
Warrant liabilities		—			—
Other permanent differences		1,685			7
Provision related to change in valuation allowance		1,947			1,996
Federal rate adjustment		—			—
NQ Options		—			—
Current year tax credit		—			—
NOL Adjustments		—			—
Termination/Cancellation of Equity Compensation Awards		—			—
Return to provision		26			(4	)
Other, net		—			—
	$	—		$	—