Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Components of Income (Loss) Before Expense for Income Taxes

The domestic and foreign components of the income (loss) before expense for income taxes were as follows:

	Years Ended December 31,
	2021			2020
Domestic	$	1,359		$	4,447
Foreign		(1,167	)		(1,001	)
	$	192		$	3,446

Summary of Expense for Income Taxes

The expense for income taxes consisted of the following:

	Years Ended December 31,
	2021		2020
Current:
Federal	$	0	$	0
State		33		29
Foreign		6		0
		39		29
Deferred:
Federal		0		0
State		0		0
Foreign		0		0
		0		0
Total	$	39	$	29

Reconciliation of Expense for Income Taxes

A reconciliation of the expense for income taxes at the federal statutory rate compared to the expense at the effective tax rate is as follows:

	Years Ended December 31
	2021			2020
Statutory federal income tax rate		21	%		21	%
State income tax, net of federal benefit		56	%		7	%
Tax effect of permanent differences		56	%		1	%
Change in valuation allowance		16	%		-19	%
Effective state rate change to deferred tax assets		8	%		0	%
Stock-based compensation windfalls		-53	%		-1	%
Foreign income taxed at different rates		53	%		1	%
Research and development credits		-134	%		-9	%
Other		-3	%		0	%
		20	%		1	%

Summary of Net Deferred Tax Accounts

The net deferred tax accounts consist of the following:

	December 31,
	2021			2020
Deferred Tax Assets:
Net operating loss carryforwards	$	6,874		$	4,138
Amortization		2,346			2,942
Federal, foreign, and state credits		2,666			2,399
Inventory reserves		1,076			995
Deferred gain		863			866
Deferred rent		476			498
Stock compensation		498			465
Accrued vacation		276			264
Other		417			401
Gross deferred tax assets		15,492			12,968
Valuation allowance		(15,258	)		(12,938	)
Net deferred tax asset		234			30
Deferred Tax Liabilities:
Depreciation		(234	)		(30	)
Net Deferred Tax Assets	$	0		$	0

The deferred tax assets net of deferred tax liabilities consisted of the following balances by tax jurisdiction:

	December 31,
	2021			2020
United States	$	11,941		$	12,157
China		1,169			781
Sweden		2,148			0
Net Deferred Tax Assets before valuation allowance	$	15,258		$	12,938
Valuation Allowance		(15,258	)		(12,938	)
Net Deferred Tax Assets	$	0		$	0

Schedule of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

	December 31,
	2021		2020
Beginning of period	$	808	$	759
Addition related to tax positions in current year		40		49
End of period	$	848	$	808