Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Schedule of Components of Benefit from Income Taxes

The components of the provision (benefit) from income taxes are as follows (in thousands):

	Year ended December 31,
	2022		2021
Current:
Federal	$	34	$	-
State		15		—
		49		—
Deferred:
Federal		—		(147	)
State		—		(122	)
		—		(269	)
Provision (benefit) from income taxes	$	49	$	(269	)

Schedule of Reconciliation of U.S. Federal Statutory Rate to Effective Tax Rate

The 2022 difference between the effective tax rate and the U.S federal statutory rates was driven primarily due to the change in valuation allowance of our deferred tax assets, state income taxes and stock-based compensation to the deferred tax assets. The 2021 difference between the effective tax rate and the U.S federal statutory rates was driven primarily due to the change in valuation allowance of our deferred tax assets. A reconciliation of the U.S. federal statutory rate to the effective tax rate is as follows:

	Year ended December 31,
	2022			2021
Federal statutory rate		21	%		21	%
State rate, net of federal benefit		12			6
Tax credits		(2	)		2
Permanent adjustments		(1	)		—
Change in valuation allowance		(24	)		(24	)
Other		(9	)		(1	)
Effective tax rate		(3	)%		4	%

Schedule of Principal Components of Deferred Tax Assets

The principal components of deferred tax assets, net, were as follows at December 31 (in thousands):

	2022			2021
Depreciation	$	-		$	367
Stock-based compensation		554			405
Research and development credits		6,817			6,904
Capitalized research expense		1,557
Net operating loss		2,562			3,380
Other		335			254
Total deferred tax assts		11,825			11,310
Valuation allowance		(11,115	)		(10,730	)
Deferred tax liabilities
Depreciation		(193	)		—
Intangibles		(517	)		(580	)
Total deferred tax liabilities		(710	)		(580	)
Net deferred tax assets (liabilities)	$	-		$	-