Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

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, 2022 and 2021 is as follows:

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, 2022 and 2021 is as follows:

	2022			2021
Income tax credit at statutory rates	$	(551	)	$	495
Tax exempt income - PPP loan		—			(271	)
Permanent tax deduction stock options exercised		(273	)		(63	)
State income tax, net of federal benefits		(124	)		177
Expiration of NOL & credits		1,149			899
Effect of change in deferred tax rate		69			—
Expiration of stock options		75			92
Other		(15	)		2
Change in valuation allowance		(347	)		(1,294	)
	$	(17	)		37

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

Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of our deferred income taxes consist of the following:

	As of December 31,
	2022			2021
Deferred tax liabilities:
Excess tax depreciation	$	(253	)		—
Total deferred tax liabilities		(253	)		—
Deferred tax assets:
Net operating loss carryforwards	$	13,416		$	14,566
179 Carryforwards		117			—
163(j) Business interest limitation carryforwards		98			—
Deferred revenue		202			—
Inventory and other allowances		177			148
Excess (tax) book depreciation		—			31
Excess (tax) book amortization		59			63
174 research & experimental expenditures		480			—
Share-based compensation		394			308
Other accrued costs		238			161
Total deferred tax assets		15,181			15,277
Less:  Valuation allowance		(14,928	)		(15,277	)
Deferred income taxes	$	—		$	—