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Note 1 - Summary of Significant Accounting Policies (Details Textual) | 3 Months Ended
--- | ---
Mar. 31, 2017 USD ($) | Mar. 31, 2016 USD ($)
Number of Subsidiaries | 4 |
Income Tax Expense (Benefit) | $ 2,389,446 | $ 2,019,023
Accounting Standards Update 2016-09 [Member] |  |
Income Tax Expense (Benefit) | $ (533,000) |

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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