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Note 11 - Income Taxes	3 Months Ended
	Mar. 31, 2017
Notes to Financial Statements
Income Tax Disclosure [Text Block]	11 . Income Taxes The effective income tax rates for the three months ended March 31, 2017 and 2016 were 39.1% and 35.9%, respectively. The increase in the effective income tax rate in 2017 was primarily due to non-recurring discrete tax items.

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- 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI http://asc.fasb.org/topic&trid=2144680

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