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Note 2 - Going Concern (Details Textual) - USD ($)
1 Months Ended 6 Months Ended
Jul. 20, 2020
Jul. 31, 2020
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Retained Earnings (Accumulated Deficit), Ending Balance     $ (94,778,693)   $ (89,723,016)
Cash and Cash Equivalents, at Carrying Value, Ending Balance     886,664   $ 79,013
Monthly Cash Requirement to Conduct Operations and Pay Dividend Obligations     680,000    
Repayments of Convertible Debt     $ 211,984  
Subsequent Event [Member]          
Proceeds from Issuance or Sale of Equity, Total $ 22,800,000 $ 22,800,000      
Repayments of Convertible Debt $ 4,200,000        
Subsequent Event [Member] | Lind Global Macro Fund, L.P. [Member]          
Repayments of Convertible Debt   $ 4,200,000