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Note 8 - Income Taxes - Reconciliation of Income Tax Expense By Applying the Statutory Federal Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income taxes at statutory rate	$ 10,603	$ 9,232	$ 2,913
State and local income taxes, net of federal tax benefit	1,094	620	282
Tax credits	(1,608)	(1,208)	(627)
Uncertain tax positions	19	(34)	(99)
Valuation allowance	30	(72)	(85)
GILTI/FDII	512	368	608
Foreign rate differential	(300)	(145)	(186)
Other	28	249	(129)
Income tax expense	$ 10,378	$ 9,010	$ 2,677

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Amount of reported income tax expense from difference to expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to global intangible low-taxed income (GILTI) and foreign-derived intangible income (FDII).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying statutory federal (national) tax rate to pretax income (loss) from continuing operation attributable to other reconciling item. Excludes state and local income tax expense (benefit), federal tax expense (benefit), statutory income tax expense (benefit) outside of country of domicile, tax credit, nondeductible expense, deduction, income tax settlement, income tax contingency, and cross-border tax law.

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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 increase (decrease) in income tax contingencies. Including, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.

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