Note 3 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

Origin of (loss) income before taxes	2023			2022
United States	$	(1,772	)	$	(1,262	)
Foreign		303			(126	)
Loss before income taxes	$	(1,469	)	$	(1,388	)

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	2023			2022
Current:
Federal	$	—		$	—
State		(19	)		(6	)
Foreign		(55	)		(10	)
Total current		(74	)		(16	)
Deferred:
Federal		2			(19	)
State		3			(19	)
Total deferred		5			(38	)
Income tax expense	$	(69	)	$	(54	)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	2023			2022
Provision at the U.S. federal statutory rate		21.0	%		21.0	%
State taxes, net of federal benefit		4.7	%		3.1	%
Foreign tax rate differential		(0.6	)%		0.4	%
Valuation allowance		(4.9	)%		(48.8	)%
Chile outside basis differential		—	%		0.4	%
Italy IRES/IREP		(3.8	)%		—	%
Accrual to return		(5.8	)%		3.1	%
Research and development credit		5.4	%		5.9	%
State rate change		(1.4	)%		9.5	%
Share based compensation		(6.7	)%		3.3	%
Other Deferred true up		(6.6	)%		—	%
Global Intangible Low-Taxed Income (GILTI) inclusion		(4.4	)%		—	%
Other		(1.7	)%		(1.8	)%
Income tax (expense) benefit effective rate		(4.8	)%		(3.9	)%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	2023			2022
Deferred tax assets:
Stock compensation expense	$	250		$	272
Goodwill		—			182
Royalty accruals		10			10
Bad debt allowance		52			53
Net operating loss carryforwards		12,048			12,158
Credit carry-forwards		1,134			1,058
Inventory reserve		153			233
Depreciation		548			585
Research and Development Costs		1,053			528
Other		606			471
Total deferred tax assets		15,854			15,550
Deferred tax liabilities:
Goodwill		(238	)		—
Intangible assets		(89	)		(100	)
Total deferred tax liabilities		(327	)		(100	)
Net deferred tax asset before valuation allowance		15,527			15,450
Valuation allowances for deferred tax assets		(15,699	)		(15,627	)
Net deferred tax liability	$	(172	)	$	(177	)

Summary of Valuation Allowance [Table Text Block]

Year	Balance at January 1		Charged to costs and expenses		(Deductions)/Other		Balance at December 31
2022	$	14,950		677		—	$	15,627
2023	$	15,627		72		—	$	15,699

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

Year	Balance at January 1		Change in positions taken in a current period		Balance at December 31
2022	$	265		28	$	293
2023	$	293		33	$	326