Note 11 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2025

Notes Tables

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

	Years ended December 31,
	2025			2024
Domestic	$	(6,868	)	$	(7,246	)
Foreign		(1	)		(486	)
Total	$	(6,869	)	$	(7,732	)

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

	Year Ended December 31,						Year Ended December 31,
	2025						2024
	Amount			Percent			Amount			Percent
Pretax Loss	$	(6,869	)				$	(7,732	)
U.S. Federal Statutory Tax Rate		(1,442	)		21	%		(1,624	)		21	%
State and Local Income Taxes, net of Federal Income Tax Effect		—			—	%		—			—	%
Foreign Tax Effects:
China
Changes in valuation allowances		(36	)		—	%		113			(1	)%
Other		6			—	%		(18	)		—	%
Other foreign jurisdictions		30			(1	)%		7			—	%
Effect of Changes in Tax Laws or Rates		—			—	%		—			—	%
Effect of Cross-Border Tax Laws:
Net CFC tested income		—			—	%		—			—	%
Tax Credits:
Tax Credits - Other		(44	)		1	%		(75	)		1	%
Change in valuation allowance		840			(12	)%		1,403			(18	)%
Nontaxable or Nondeductible Items:
Other		2			—	%		4			—	%
Stock Compensation		644			(9	)%		274			(4	)%
Changes in Unrecognized Tax Benefits		—			—	%		—			—	%
Other Adjustments:
Return to Provision - Other		—			—	%		(84	)		1	%
Effective Tax Rate	$	—			—	%	$	—			—	%

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

	Years ended December 31,
	2025			2024
	(in thousands)
Deferred tax assets:
Net operating loss carryforwards	$	21,872		$	20,058
Tax credit carryforwards		2,445			2,387
Capitalized research and development		972			1,553
Stock-based compensation		2,520			2,809
Lease liabilities		54			80
Accruals & Others		96			7
Total deferred tax assets		27,959			26,894
Less: valuation allowance		(27,906	)		(26,814	)
Deferred tax assets		53			80
Deferred tax liability:
Operating lease assets		(53	)		(80	)
Total deferred tax liability		(53	)		(80	)
Net deferred tax assets (liabilities)	$	—		$	—