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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Components of Income/(Loss) Before Income Tax Provision (Benefit)

The components of income/(loss) from continuing operations before income tax provision (benefit) as of December 31, 2019 and 2018 are as follows (in thousands):

		2019				2018
U.S.		$	(3,439	)		$	(8,346	)
Foreign			403				(507	)
		$	(3,036	)		$	(8,853	)

Reconciliation of Total Income Tax Provision

A reconciliation of the total income tax provision tax rate to the statutory federal income tax rates of 21% for the years ended December 31, 2019 and 2018, respectively, is as follows:

		2019				2018
Income tax expense (benefit) at federal statutory rate			(21.0	)%			(21.0	)%
Income tax expense (benefit) at state statutory rate			(12.2	)%			(6.1	)%
Change in valuation allowance			23.0	%			34.8	%
Change in state rate			(1.3	)%			(0.1	)%
Permanent interest adjustments			1.1	%			0.7	%
Stock compensation			13.7	%			1.8	%
Research credit			(1.8	)%			(1.4	)%
Return to provision			3.1	%			(3.4	)%
NOLs expiring and adjustments to NOL			19.2	%			—
Mark to market adjustment			(24.0	)%			(5.3	)%
Other, net			0.2	%			—
			0.0	%			(0.0	)%

Deferred Tax Assets and Liabilities

The tax effects of temporary differences that give rise to significant portions of our deferred tax assets and deferred tax liabilities as of December 31, 2019 and 2018 are as follows (in thousands):

		2019				2018
Deferred tax assets:
Allowances and reserves		$	6			$	270
Accrued expenses			283				122
Stock based compensation			657				996
Net operating loss carryforwards			92,659				91,197
Income tax credit carryforwards			8,749				8,671
Property and equipment, principally due to differences in    depreciation			95				548
Intangible assets			370
Other, net			217				38
			103,036				101,842
Valuation allowance			(102,822	)			(101,091	)
Total deferred tax assets, net of allowance			214				751
Deferred tax liabilities:
Other			(214	)			(751	)
Total deferred tax liability			(214	)			(751	)
Net deferred tax assets (liability)		$	—			$	—

Unrecognized Tax Benefits Activity

Following is a tabular reconciliation of the unrecognized tax benefits activity during the years ended December 31, 2019 and 2018 (in thousands):

		2019				2018
Unrecognized Tax Benefits – Beginning		$	2,216			$	2,157
Gross increases – tax positions in prior period			—				1
Gross decreases – tax positions in prior period			(18	)			(3	)
Gross increase – current-period tax positions			36				61
Unrecognized Tax Benefits – Ending		$	2,234			$	2,216

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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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