Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Schedule of reconciliation of income tax expense by applying federal income tax rate to loss before provision for income taxes

A reconciliation of income tax expense to the amount computed by applying the Federal income tax rate to loss before provision for income taxes as of December 31, 2019 and 2018 is as follows:

	2019			2018
Income tax credit at statutory rates	$	(631	)	$	(437	)
Nondeductible expenses		3			4
State income tax, net of federal benefits		(226	)		(156	)
Expiration of NOL & Credits		1,530			1,559
Tax basis in excess of book Convertible Debt		342			0
Expiration of Stock Options		125			179
Other		0			0
Change in valuation allowance		(1,143	)		(1,149	)
	$	—		$	—

Schedule of significant components of deferred income taxes

Significant components of our deferred income taxes consist of the following:

	As of December 31,
	2019			2018
Deferred tax liabilities:
Excess tax basis convertible debt	$	(334	)	$	—
Total deferred tax liabilities		(334	)		—
Deferred tax assets:
Net operating loss carryforwards	$	21,912		$	22,560
Inventory and other allowances		14			35
Charitable contribution carryforwards		1			2
Excess (tax) book depreciation		451			524
Excess (tax) book amortization		59			57
Share-based compensation		693			749
Other accrued costs		127			141
Total deferred tax assets		23,257			24,068
Less:  Valuation allowance		(22,923	)		(24,068	)
Deferred income taxes	$	—		$	—