Note 3 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

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

Origin of income before taxes	2022			2021
United States	$	(1,262	)	$	798
Foreign		(126	)		(730	)
Income (loss) before income taxes	$	(1,388	)	$	68

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

	2022			2021
Current:
Federal	$	—		$	—
State		(6	)		(9	)
Foreign		(10	)		—
Total current		(16	)		(9	)
Deferred:
Federal		(19	)		—
State		(19	)		(5	)
Total deferred		(38	)		(5	)
Income tax expense	$	(54	)	$	(14	)

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

	2022			2021
Provision at the U.S. federal statutory rate		21.0	%		21.0	%
State taxes, net of federal benefit		3.1	%		(15.5	)%
Foreign tax rate differential		0.4	%		(30.2	)%
Valuation allowance		(48.8	)%		(1504.6	)%
Chile outside basis differential		0.4	%		34.4	%
PPP Loan Forgiveness		—	%		(484.6	)%
Accrual to return		3.1	%		(329.3	)%
Research and development credit		5.9	%		(144.9	)%
State rate change		9.5	%		(124.0	)%
China deferred adjustment		—	%		1006.0	%
China enterprise tax		—	%		—	%
Share based compensation		3.3	%		1590.3	%
Other true up		—	%		—	%
Intangible assets impairment and other non-deductibles		—	%		—	%
Other		(1.8	)%		2.0	%
Income tax (expense) benefit effective rate		(3.9	)%		20.6	%

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

	2022			2021
Deferred tax assets:
Stock compensation expense	$	272		$	173
Goodwill		182			591
Royalty accruals		10			10
Bad debt allowance		53			51
Net operating loss carryforwards		12,158			11,950
Credit carry-forwards		1,058			992
Inventory reserve		233			217
Depreciation		585			556
Research and Development Costs		528			—
Other		471			376
Total deferred tax assets		15,550			14,916
Deferred tax liabilities:
Intangible assets		(100	)		(105	)
Total deferred tax liabilities		(100	)		(105	)
Net deferred tax asset before valuation allowance		15,450			14,811
Valuation allowances for deferred tax assets		(15,627	)		(14,950	)
Net deferred tax liability	$	(177	)	$	(139	)

Summary of Valuation Allowance [Table Text Block]

Year	Balance at January 1		Charged to costs and expenses			(Deductions)/Other		Balance at December 31
2021	$	15,971		(1,021	)		—	$	14,950
2022	$	14,950		677			—	$	15,627