Note 14 - Income Taxes	3 Months Ended
Mar. 31, 2021
Notes to Financial Statements
Income Tax Disclosure [Text Block]	14. Income Taxes The effective income tax rates for the three months ended March 31, 2021 and 2020 were 19.1% and 17.9%, respectively. The increase in the effective tax rate was primarily due to the significant increase in the mix of domestic pretax income in the current year.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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