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Note 4 - Acquisition - Summary of Assets Acquired and Liabilities Assumed (Details) - USD ($)
Dec. 31, 2016
Jan. 08, 2016
Dec. 31, 2015
Goodwill $ 6,929,258  
Diffusion LLC [Member]      
Cash and cash equivalents   $ 8,500,602  
Prepaid expenses and other assets   195,200  
Property and equipment   57,531  
Intangible assets   9,600,000  
Goodwill   6,929,258  
Accrued liabilities   (377,432)  
Deferred tax liability   (3,644,159)  
Net assets acquired   $ 21,261,000