Note 11 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2024

Notes Tables

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

	Years ended December 31,
	2024			2023
Computed “expected” income tax benefit		21.0	%		21.0	%
State income tax benefit, net of federal income tax benefit		5.0	%		6.3	%
Tax credits		1.0	%		0.6	%
Foreign rate differential		0.2	%		0.0	%
Change in valuation allowance		(24.8	)%		0.0	%
Stock Compensation		(3.5	)%		0.0	%
Other		1.1	%		(27.9	)%
Total income taxes		—	%		—	%

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

	Years ended December 31,
	2024			2023
	(in thousands)
Deferred tax assets:
Net operating loss carryforwards	$	20,058		$	18,799
Tax credit carryforwards		2,387			2,315
Capitalized research and development		1,553			1,288
Stock-based compensation		2,809			2,504
Lease liabilities		80			13
Accruals & Others		7			—
Total deferred tax assets		26,894			24,919
Less: valuation allowance		(26,814	)		(24,906	)
Deferred tax assets		80			13
Deferred tax liability:
Operating lease assets		(80	)		(13	)
Total deferred tax liability		(80	)		(13	)
	$	—		$	—