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Note 14 - Preferred Shares (Details Textual) - USD ($)
12 Months Ended 24 Months Ended
Dec. 16, 2021
Jan. 30, 2021
Jan. 29, 2021
Jun. 19, 2019
Jan. 29, 2019
Jan. 27, 2014
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jan. 29, 2021
May 30, 2018
Preferred Stock, Shares Authorized (in shares)               20,000,000        
Preferred Stock, Par or Stated Value Per Share (in dollars per share)               $ 0.01        
Payments for Repurchase of Redeemable Preferred Stock             $ (0) $ 16,606,000 $ (0)      
Preferred Deemed Dividend             (0) 665,287 (0)      
Dividends, Preferred Stock, Total               1,085,902 1,573,874      
Dividends, Paid-in-kind, Total             $ 0 0 1,219,048      
Series B Preferred Stock [Member]                        
Proceeds from Issuance of Convertible Preferred Stock           $ 29,000,000            
Preferred Stock, Redemption Price Per Share (in dollars per share)           $ 1,000            
Preferred Stock, Shares Issued, Total (in shares)                       19,042
Preferred Stock, Dividend Rate, Percentage   14.00% 14.00% 8.00% 40.00%         9.25% 12.00%  
Preferred Stock Convertible Initial Conversion Price (in dollars per share)         $ 31.64              
Payments for Repurchase of Redeemable Preferred Stock $ 13,606,000   $ 3,000,000.0 $ 4,300,000                
Preferred Deemed Dividend $ 545,287   $ 120,000                  
Dividends, Preferred Stock, Total                 1,573,874      
Dividends, Preferred Stock, Cash               $ 1,085,902 354,826      
Dividends, Paid-in-kind, Total                 $ 1,219,048      
Series B Preferred Stock [Member] | Maximum [Member]                        
Preferred Stock, Dividend Rate, Percentage         5.00%              
TCP [Member] | Series B Preferred Stock [Member]                        
Stock Issued During Period, Shares, New Issues (in shares)           25,000            
Preferred Friends Investment Company, Inc [Member] | Series B Preferred Stock [Member]                        
Stock Issued During Period, Shares, New Issues (in shares)           5,700