Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Taxes

Schedule of components of income taxes

For the years ended December 31, 2022 and 2021, the Company’s provision for income tax consisted of (in thousands):

	Year Ended December 31,
	2022		2021
Current:
Federal	$	—	$	—
State		14		4
Foreign		—		—
Total Current	$	14	$	4
Deferred:
Federal	$	—	$	—
State		—		—
Foreign		—		—
Total Deferred	$	—	$	—
Provision for income taxes	$	14	$	4

Schedule of reconciliation of statutory federal income tax rate

	Year Ended December 31,
	2022		2021
Tax at statutory federal rate	21.0	%	21.0	%
State taxes, net of federal benefit	1.9		1.8
Stock-based compensation	4.2		4.7
IRC section 162(m) limitation	1.1		—
Change in valuation allowance	(28.0)		(27.5)
Other	—		0.1
Provision for income taxes	0.2	%	0.1	%

Schedule of tax effects of temporary differences and carryforwards

The tax effects of temporary differences and carryforwards that give rise to significant portions of the deferred tax assets are as follows (in thousands):

	December 31,
	2022		2021
Deferred tax assets:
Net operating loss carryforwards	$	27,110	$	30,658
Inventory		273		278
Accruals		737		801
Depreciation and amortization		27		240
Research and experimental expenditures		2,229		—
Stock-based compensation		270		177
Right of use liability		1,477		206
Gross deferred tax assets		32,123		32,360
Valuation allowance		(30,328)		(32,047)
Deferred tax assets		1,795		313
Deferred tax liabilities:
Right of use asset		(1,463)		(209)
Other		(332)		(104)
Deferred tax liabilities		(1,795)		(313)
Net deferred tax assets	$	—	$	—

Schedule of changes in the Company's gross unrecognized tax benefits

A summary of changes in the Company’s gross unrecognized tax benefits for the years ended December 31, 2022 and 2021 was as follows (in thousands):

	Year Ended December 31,
	2022		2021
Unrecognized tax expense, beginning of the year	$	105	$	104
Decrease related to prior year tax positions		(16)		(12)
Increase related to current year tax positions		16		13
Unrecognized tax expense, end of year	$	105	$	105