Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Taxes

Schedule of Components of Income Tax Expense (Benefit)

The components of the income tax (benefit) provision are summarized as follows (in thousands):

	Year Ended December 31,
	2022		2021
Current:
Federal	$	—	$	—
State and foreign		2		7
Total current		2		7
Deferred:
Federal		(151)
State		(51)		—
Total deferred		(202)
Income tax (benefit) provision	$	(200)	$	7

Schedule of Effective Income Tax Rate Reconciliation

The following table represents the reconciliation between the reported income taxes and the income taxes that would be computed by applying the federal statutory rate (21% for years ended December 31, 2022 and 2021) to income before taxes (in thousands):

	Year Ended December 31,
	2022		2021
Income tax provision at federal statutory rate	$	(81)	$	(97)
Add (deduct) effect of:
State income taxes, net of federal tax		(26)		(28)
Expiration of federal research and development credits		1,022		1,016
Change in valuation allowance		(1,115)		(884)
Income tax (benefit) provision	$	(200)	$	7

Schedule of Deferred Tax Assets and Liabilities

As of December 31, 2022 and 2021, the cumulative tax effects of temporary differences that give rise to the deferred tax assets were as follows (in thousands):

	December 31,		December 31,
	2022		2021
Deferred tax assets:
Federal and state net operating loss carryforward	$	23,639	$	23,530
Research and development credits carryforward		12,758		13,780
Total gross deferred tax assets		36,397		37,310
Less valuation allowance		(36,195)		(37,310)
Net deferred tax assets	$	202	$	—