Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Schedule of Deferred Tax 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,
	2019			2018
Deferred tax assets:
Net operating loss carryforwards	$	63,002		$	69,619
Tax credit carryforwards		37,901			33,348
Equipment, furnishings and other		4,178			4,523
Total deferred tax assets		105,081			107,490
Deferred tax liabilities		—			—
Net deferred tax assets		105,081			107,490
Valuation allowance		(105,081	)		(107,490	)
	$	—		$	—

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,
	2019			2018
Federal benefit at statutory rate	$	(1,504	)	$	(1,907	)
State income taxes, net of Federal taxes		(500	)		(657	)
State credits		2			(112	)
Warrant liabilities		—			(111	)
Other permanent differences		45			12
Provision related to change in valuation allowance		2,409			(1,415	)
Federal rate adjustment		—			—
NQ Options		—			—
Current year tax credit		—			—
NOL Adjustments		—			—
Termination/Cancellation of Equity Compensation Awards		—			695
Return to provision		(452	)		664
Other, net		—			2
	$	—		$	1