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Note 13 - Subsequent Events (Details Textual) - shares
1 Months Ended 3 Months Ended 9 Months Ended
Nov. 06, 2019
Oct. 31, 2019
Sep. 30, 2019
Sep. 30, 2019
Stock Issued During Period, Shares, Issued for Services       41,954
Subsequent Event [Member]        
Stock Issued During Period, Shares, Issued for Services   678,744    
Conversion of Series H Preferred Stock Into Common Stock [Member]        
Conversion of Stock, Shares Converted     1,002 1,002
Conversion of Stock, Shares Issued     94,687,441 94,687,441
Conversion of Series H Preferred Stock Into Common Stock [Member] | Subsequent Event [Member]        
Conversion of Stock, Shares Converted 466      
Conversion of Stock, Shares Issued 330,000,000