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Note 14 - Technology Development and Licensing Agreements (Details Textual) - USD ($)
3 Months Ended
Jan. 18, 2013
Mar. 31, 2013
Jun. 30, 2017
Dec. 31, 2016
Mar. 31, 2015
Contractual Obligation     $ 804,762 $ 1,115,193  
Deferred Revenue   $ 5,000,000      
Deferred Revenue Amortization Period   10 years      
Hisun [Member]          
Contractual Obligation         $ 685,787
Proceeds from License Fees Received $ 5,000,000