Note 7 - Income Taxes (Details Textual) - USD ($)	9 Months Ended
Sep. 30, 2024	Dec. 31, 2023
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 6,700,000	$ 5,300,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 389,000	$ 302,000
Domestic Tax Jurisdiction [Member]
Open Tax Year	2020 2021 2022 2023
State and Local Jurisdiction [Member]
Open Tax Year	2019 2020 2021 2022 2023

Tax year that remains open to examination under enacted tax laws, in YYYY format.

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Amount of interest expense accrued for an underpayment of income taxes.

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