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Note 12 - Other Income, Net (Details Textual) - Joint Marketing Agreement [Member] - USD ($) | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Nov. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Recognized During the Current Year [Member] |  |  |  |  |
Other Nonrecurring Gain |  | $ 100,000 | $ 0 | $ 300,000 | $ 0
Other Nonrecurring Gain | $ 1,500,000 |  |  |  |
Other Non-recurring Gain, Term of Recognition |  |  |  | 3 years |

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- Definition The term over which the nonrecurring gain is recognized. + References No definition available. + Details
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- Definition Amount of gain that is infrequent in occurrence or unusual in nature. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64828382&loc=d3e15138-107781 + Details
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- Details
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- Details
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