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Note 10 - Income Taxes (Tables) | 9 Months Ended
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Sep. 30, 2018
Notes Tables |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Income tax expense |  | $ | 22,342 |  |  | $ | 10,529 |  |  | $ | 43,598 |  |  | $ | 65,751 |
Effective income tax rate |  |  | 26.5% |  |  |  | 40.7% |  |  |  | 26.2% |  |  |  | 40.6% |

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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