Note 10 - Income Taxes - Income Tax Paid, by Individual Jurisdiction (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Total cash paid for income taxes, net of refunds	$ 2,362	$ 2,498
Internal Revenue Service (IRS) [Member]
U.S. federal	1,329
California Franchise Tax Board [Member]
Income tax paid, state and local	185
Other State and Local [Member]
Income tax paid, state and local	74
Federal Ministry of Finance, Germany [Member]
Germany	$ 774

Amount, after income tax refund received, of cash paid to federal (national) tax jurisdiction for tax on income.

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Amount, after income tax refund received, of cash paid to foreign tax jurisdiction for tax on income.

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Amount, after income tax refund received, of cash paid to state and local tax jurisdictions for tax on income.

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Amount, after refund, of cash paid to foreign, federal, state, and local jurisdictions as income tax.

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