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Note 12 - Income Taxes - Comparison of Federal Statutory Income Tax Rates to Effective Income Tax Rates (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Statutory federal tax, amount $ 7,493 $ 12,652 $ 19,182
Statutory federal tax, rate 21.00% 21.00% 21.00%
State tax, net of federal benefit $ 3,391 $ 5,181 $ 8,278
State tax, net of federal benefit, rate 9.50% 8.60% 9.10%
Tax-exempt income, amount $ (429) $ (399) $ (355)
Tax-exempt income, rate (1.20%) (0.70%) (0.40%)
Stock-based compensation, amount $ (10) $ 54 $ (396)
Stock-based compensation, rate 0.00% 0.10% 0.40%
Stock-based compensation, rate (0.00%) (0.10%) (0.40%)
Tax credits, net of amortization, amount $ (978) $ (62) $ (80)
Tax credits, net of amortization, rate (2.70%) (0.10%) (0.10%)
Other items, net, amount $ (453) $ 355 $ 389
Other items, net, rate (1.30%) 0.60% 0.40%
Total income tax expense $ 9,014 $ 17,781 $ 27,018
Total income tax expense, rate 25.30% 29.50% 29.60%