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Note 11 - Income Taxes (Details Textual)
6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Effective Income Tax Rate Reconciliation, Percent 9.40% 13.20%
Domestic Tax Jurisdiction [Member] | Internal Revenue Service (IRS) [Member]    
Open Tax Year 2020 2021 2022 2023  
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member]    
Open Tax Year 2019 2020 2021 2022 2023