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Note 9 - Intangible Assets and Goodwill (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Jan. 31, 2015
Reclassified from in Process Research and Development [Member] | Developed Technology Rights [Member]          
Finite-Lived Intangible Assets, Gross         $ 400,000
Amortization of Intangible Assets $ 266,863 $ 518,699 $ 802,643 $ 1,593,260