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Note 16 - Mezzanine Equity (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 4 Months Ended 6 Months Ended 12 Months Ended
Mar. 30, 2020
Feb. 17, 2020
Jun. 30, 2019
Mar. 29, 2019
Mar. 29, 2020
Dec. 02, 2019
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Nov. 06, 2019
Adjustments to Additional Paid in Capital, Beneficial Conversion Feature of Convertible Preferred Stock               $ 1,067 $ 9,339  
Conversion of Series E Preferred Stock into Commmon Stock [Member]                    
Convertible Preferred Stock, Conversion Price (in dollars per share)               $ 0.94    
Conversion of Stock, Shares Converted (in shares)               11,264    
Conversion of Stock, Shares Issued (in shares)               12,901,674    
Series E Preferred Stock [Member]                    
Preferred Stock Dividends, Shares (in shares)               900    
Dividends, Preferred Stock, Cash             $ 1,621 $ 864    
Adjustments to Additional Paid in Capital, Beneficial Conversion Feature of Convertible Preferred Stock               1,067 9,339  
Preferred Stock Redeemed During Period, Shares (in shares)         21,364          
Preferred Stock Redeemed During Period, Value         $ 24,569          
Temporary Equity, Accretion to Redemption Value               2,253 $ 4,227  
Dividends, Preferred Stock, Total               1,796    
Dividends, Preferred Stock, Stock               $ 900    
Series E Convertible Preferred Stock [Member]                    
Convertible Preferred Stock, Conversion Price, Percentage of VWAP                   80.00%
Family Trading Inc [Member] | Series E Preferred Stock [Member]                    
Stock Issued During Period, Shares, New Issues (in shares)       27,129            
Shares Issued, Price Per Share (in dollars per share)       $ 1,000            
Convertible Preferred Stock, Conversion Price (in dollars per share)       $ 500.00            
Convertible Preferred Stock, Conversion Price, Percentage of VWAP       80.00%            
Preferred Stock, Number of Common Shares Voting Rights (in shares)       1,000            
Preferred Stock, Liquidation Preference Per Share (in dollars per share)       $ 1,000            
Preferred Stock Redemption Premium, Percent of Liquidation Amount Redeemed       15.00%   15.00%        
Preferred Stock, Dividend Rate, Percentage       15.00% 15.00%          
Preferred Stock, Accrued Dividend, Interest Rate       15.00% 20.00%          
Preferred Stock Dividends, Shares (in shares)     1,029              
Stock Redeemed or Called During Period, Shares (in shares)           12,434        
Stock Redeemed or Called During Period, Value           $ 14,302        
Deemed Dividend on Temporary Equity Realized Redemptions           $ 1,868        
Temporary Equity, Realized Redemptions on Deemed Dividends         $ 3,204          
Family Trading Inc [Member] | Series E Preferred Stock [Member] | Minimum [Member]                    
Convertible Preferred Stock, Conversion Price (in dollars per share)       $ 0.60            
Family Trading Inc [Member] | Series E Convertible Preferred Stock [Member]                    
Stock Issued During Period, Shares, Purchase of Assets (in shares)   16,004                
Convertible Stock Issued, Settlement of Consideration   $ 14,350                
Convertible Stock Issued, Settlement of Dividends   1,621                
Convertible Stock Issued, Settlement of Interest on Dividends   $ 32                
Yorkville [Member] | Series B Preferred Stock [Member]                    
Preferred Stock Redemption Premium, Percent of Liquidation Amount Redeemed 20.00%