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Note 9 - Intangible Assets and Goodwill (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Jan. 31, 2015
Developed Technology Rights [Member] | Reclassified from in Process Research and Development [Member]          
Finite-Lived Intangible Assets, Gross         $ 400,000
Amortization of Intangible Assets $ 265,508 $ 536,226 $ 535,780 $ 1,074,561