Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of income (loss) before income taxes

	Year Ended
	December 31,
	2021			2020
	(in thousands)
U.S.	$	(730	)	$	(3,060	)
Foreign		0			2,010
Total	$	(730	)	$	(1,050	)

Schedule of income taxes

	Year Ended
	December 31,
	2021		2020
	(in thousands)
Current
U.S.	$	0	$	0
State		0		0
Foreign		0		13
Total current income tax expense		0		13
Deferred
U.S.		0		0
State		0		0
Foreign		0		0
Total deferred income tax expense (benefit)		0		0
Total income tax expense (benefit)	$	0	$	13

Schedule of reconciliation of income tax computed at the federal statutory rate to income before taxes

	Year Ended
	December 31,
	2021			2020
U.S. federal statutory rate		(21.0	)%		(21.0	)%
State taxes net of federal benefit		(6.9	)		(18.2	)
Foreign rate differential and transactional tax		0.0			5.9
Tax credits		0.0			0.0
Valuation allowance		27.9			33.3
Other		0.0			1.0
		0.0	%		1.0	%

Schedule of significant components of the Company’s net deferred income taxes

	2021			2020
	(in thousands)
Deferred tax assets:
Allowance for doubtful accounts	$	5		$	1
Inventory reserves		3,033			3,096
Consumables excess reserve		162			167
Accrued liabilities		155			81
Warrant interest expense		195			195
Stock compensation expense		775			789
State net operating loss		13,358			14,476
Net operating loss carryforward		39,597			41,105
Capital loss carryforward		6,755			-
Tax credits		669			710
Depreciation		423			1,000
Valuation allowance		(65,079	)		(61,556	)
Total deferred tax assets		47			64
Deferred tax liability:
Prepaid expenses		(47	)		(64	)
Net deferred tax liability	$	0		$	0