Note 8 - Recently Adopted Accounting Pronouncements (Details Textual) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
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| Adjustments for New Accounting Principle, Early Adoption [Member] | ||||
| Tax Adjustments, Settlements, and Unusual Provisions | $ 1.4 | $ 1.2 | $ 3.5 | $ 3.5 |
| X | ||||||||||
- Definition Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Details
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