Note 15 - Income Taxes - Reconciliation of Statutory Federal Income Tax Rate to Effective Income Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Income taxes computed at statutory rates, amount	$ 8,183	$ 9,609
Income taxes computed at statutory rates, percent	(21.00%)	(21.00%)
Change in valuation allowance, amount	$ (9,319)	$ (11,716)
Change in valuation allowance, percent	24.00%	26.00%
NOL surrendered for refundable tax credit	$ (1,355)	$ (1,607)
NOL surrendered for refundable tax credit	4.00%	4.00%
Foreign research deductions and credits	$ 650	$ 803
Foreign research deductions and credits, percent	(2.00%)	(2.00%)
Federal and state research and experimentation credits, amount	$ 1,288	$ 1,412
Federal and state research and experimentation credits, percent	(3.00%)	(3.00%)
State income taxes, net of federal tax benefit, amount	$ (139)	$ 468
State income taxes, net of federal tax benefit, percent	0.00%	(1.00%)
Other, amount	$ 648	$ 827
Other, percent	(2.00%)	(3.00%)
Total	$ (44)	$ (204)
Total, percent	0.00%	0.00%

Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign research deductions and credits.

No definition available.