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Note 12 - Mezzanine Equity (Details Textual) - $ / shares
Mar. 30, 2020
Jun. 30, 2019
Mar. 29, 2019
Dec. 31, 2018
Series E Preferred Stock [Member]        
Preferred Stock, Shares Outstanding, Ending Balance   28,158   0
Family Trading Inc [Member] | Conversion of Series E Preferred Stock To Common Stock [Member]        
Convertible Preferred Stock, Shares Issued upon Conversion   4,177,745    
Family Trading Inc [Member] | Series E Preferred Stock [Member]        
Stock Issued During Period, Shares, New Issues     27,129  
Shares Issued, Price Per Share     $ 1,000  
Convertible Preferred Stock, Numerator Price     1  
Convertible Preferred Stock, Conversion Price   $ 6.74 $ 20  
Convertible Preferred Stock, Conversion Price, Percentage of VWAP     80.00%  
Preferred Stock, Number of Common Shares Voting Rights     1,000  
Preferred Stock, Liquidation Preference Per Share     $ 1,000  
Preferred Stock Redemption Premium, Percent of Liquidation Amount Redeemed     15.00%  
Preferred Stock, Dividend Rate, Percentage     15.00%  
Preferred Stock, Accrued Dividend, Interest Rate     15.00%  
Preferred Stock Dividends, Shares   1,029    
Preferred Stock, Shares Outstanding, Ending Balance   28,158    
Family Trading Inc [Member] | Series E Preferred Stock [Member] | Minimum [Member]        
Convertible Preferred Stock, Conversion Price     $ 0.60  
Yorkville [Member] | Series B Preferred Stock [Member] | Forecast [Member]        
Preferred Stock Redemption Premium, Percent of Liquidation Amount Redeemed 20.00%