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Note 10 - Convertible Notes - Related Party (Details Textual)
3 Months Ended
May 20, 2019
USD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2018
USD ($)
Interest Expense, Related Party   $ 113,213 $ 104,286  
Convertible Debt Payable to Related Party [Member]        
Interest Payable, Related Party   647,984   $ 588,854
Interest Expense, Related Party   $ 59,129 $ 61,244  
Debt Instrument, Convertible, Number of Equity Instruments   1,586,676    
Convertible Debt Payable to Related Party [Member] | Subsequent Event [Member]        
Convertible Debt, Total $ 926,368      
Convertible Debt to Related Party in Default [Member] | Subsequent Event [Member]        
Debt Instrument, Convertible, Number of Equity Instruments 578,980