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Note 5 - Intangible Assets, net (Details) - Schedule of Finite-Lived Intangible Assets - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Less: accumulated amortization $ (2,656,331) $ (2,554,655)
Intangible assets, net 3,694,228 3,795,904
Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross 6,150,559 6,150,559
Trademarks [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross $ 200,000 $ 200,000