Note 16 - Income Taxes - Reconciliation of Statutory Federal Income Tax Rate to Effective Income Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Income taxes computed at statutory rates, amount	$ 9,609	$ 12,537
Income taxes computed at statutory rates, percent	(21.00%)	(21.00%)
(Increases) decreases resulting from:
Change in valuation allowance, amount	$ (11,716)	$ (13,463)
Change in valuation allowance, percent	26.00%	22.00%
NOL surrendered for refundable tax credit	$ (1,607)	$ (2,164)
NOL surrendered for refundable tax credit	4.00%	4.00%
Foreign research deductions and credits	$ 803	$ 1,329
Foreign research deductions and credits, percent	(2.00%)	(2.00%)
Federal and state research and experimentation credits, amount	$ 1,412	$ 1,037
Federal and state research and experimentation credits, percent	(3.00%)	(2.00%)
State income taxes, net of federal tax benefit, amount	$ 468	$ 491
State income taxes, net of federal tax benefit, percent	(1.00%)	(1.00%)
Other, amount	$ 827	$ 136
Other, percent	(3.00%)	0.00%
Total	$ (204)	$ (97)
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.