Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

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, 2020 and 2019 is as follows:

	2020			2019
Income tax credit at statutory rates	$	208		$	(631	)
Nondeductible expenses		5			3
State income tax, net of federal benefits		74			(226	)
Expiration of NOL & Credits		2,543			1,530
Tax basis in excess of book Convertible Debt		—			342
Expiration of Stock Options		122			125
Other		(7	)		—
Change in valuation allowance		(2,945	)		(1,143	)
	$	—		$	—

Schedule of significant components of deferred income taxes

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

	As of December 31,
	2020			2019
Deferred tax liabilities:
Excess tax basis convertible debt	$	(257	)	$	(334	)
Total deferred tax liabilities		(257	)		(334	)
Deferred tax assets:
Net operating loss carryforwards	$	15,597		$	21,912
Inventory and other allowances		23			14
Charitable contribution & other carryforwards		9			1
Excess (tax) book depreciation		375			451
Excess (tax) book amortization		61			59
Share-based compensation		624			693
Other accrued costs		138			127
Total deferred tax assets		16,827			23,257
Less: Valuation allowance		(16,570	)		(22,923	)
Deferred income taxes	$	—		$	—