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Note 12 - Federal and State Income Taxes - Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Federal income tax at statutory rate, amount | $ 21,526 | $ 4,916 | $ 2,124
Federal income tax at statutory rate, percent | 21.00% | 21.00% | 21.00%
Nondeductible per diem and meals, amount | $ 0 | $ 321 | $ 0
Nondeductible per diem and meals, percent | 0.00% | 1.40% | 0.00%
Other nondeductible expenses, net, amount | $ 0 | $ 0 | $ 342
Other nondeductible expenses, net, percent | 0.00% | 0.00% | 3.40%
State income taxes/other, net, amount | $ 4,463 | $ 345 | $ (251)
State income taxes/other, net, percent | 4.40% | 1.50% | (2.50%)
Total federal & state income tax expense | $ 25,989 | $ 5,582 | $ 2,215
Total income tax (benefit) expense, percent | 25.40% | 23.90% | 21.90%

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