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Note 10 - Income Taxes - Income Tax Rate Reconciliation (Details)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Computed “expected” tax rate 21.00% 34.00% 34.00%
State taxes, net of federal tax benefit 2.80% 3.50% 3.70%
Meals and entertainment 0.20% 0.30% 0.20%
Tax credits (1.90%) (0.60%) (0.60%)
Domestic production deduction (2.60%) (2.50%)
Non-deductible ISO stock option expense 0.10% 0.10% 0.30%
Unrecognized tax benefits (0.10%)
Excess tax benefits on equity awards (1.30%) (1.40%)
Excess compensation 0.80%
Impact on deferred taxes of new legislation (11.10%)
Other 0.50% 0.10% 0.30%
Effective tax rate 22.20% 22.30% 35.30%