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Note 11 - Income Taxes (Details Textual)
6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Effective Income Tax Rate Reconciliation, Percent 19.70% 9.40%
Domestic Tax Jurisdiction [Member] | Internal Revenue Service (IRS) [Member]    
Open Tax Year 2022 2023 2024  
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member]    
Open Tax Year 2021 2022 2023 2024