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Note 17 - Equity (Details Textual)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Feb. 01, 2024
USD ($)
$ / shares
shares
Feb. 01, 2023
USD ($)
$ / shares
shares
Mar. 10, 2020
$ / shares
shares
Dec. 23, 2019
$ / shares
shares
Jun. 30, 2024
USD ($)
$ / shares
shares
Mar. 31, 2024
USD ($)
$ / shares
Jun. 30, 2023
USD ($)
Mar. 31, 2023
USD ($)
Jun. 30, 2024
USD ($)
$ / shares
shares
Jun. 30, 2023
USD ($)
Dec. 31, 2023
$ / shares
shares
Oct. 05, 2023
USD ($)
Dec. 01, 2020
USD ($)
Preferred Stock, Shares Outstanding, Ending Balance (in shares)         27,413,098       27,413,098   27,413,098    
Preferred Stock, Shares Authorized (in shares)         50,000,000       50,000,000   50,000,000    
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares     $ 0.001   $ 0.001       $ 0.001   $ 0.001    
Preferred Stock, Shares Issued, Total (in shares)         27,413,098       27,413,098   27,413,098    
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ / shares         $ 0.25 $ 0.25              
Stock Issued During Period, Value, New Issues | $         $ 154                
Equity Agreement [Member] | Northland Capital Markets [Member] | Maximum [Member]                          
Aggregate Offering Price | $                         $ 75,000
Equity Distribution Agreement [Member]                          
Stock Issued During Period, Shares, New Issues (in shares)         13,500       13,500        
Sale of Stock, Maximum Shares Permitted by SEC | $                       $ 4,712  
Sale of Stock, Commission, Percent                       2.50%  
Stock Issued During Period, Value, New Issues | $         $ 154       $ 154        
Additional Paid-in Capital [Member]                          
Minority Interest, Increase (Decrease) Related to Units of Consolidated Subsidiary | $         198 $ 447 $ 30 $ 582 645 $ 612      
Stock Issued During Period, Value, New Issues | $         154                
AOCI Attributable to Parent [Member]                          
Minority Interest, Increase (Decrease) Related to Units of Consolidated Subsidiary | $         (4) (10) (1) (12) (14) (13)      
Noncontrolling Interest [Member]                          
Minority Interest, Increase (Decrease) Related to Units of Consolidated Subsidiary | $         $ (194) $ (437) $ (29) $ (570) $ (631) $ (599)      
The 2020 Rights Agreement [Member]                          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares     100                    
Repurchase of Warrants, Price per Share (in dollars per share) | $ / shares     200                    
Share Price (in dollars per share) | $ / shares     $ 20                    
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)     10                    
Voting Power, Percentage     50.00%                    
Percentage of Purchase Price Required for Adjustments     1.00%                    
Number of Fractal Units Issued (in shares)     0                    
Preferred Stock, Redemption Price Per Share (in dollars per share) | $ / shares     $ 0.001                    
Executive Chairman [Member]                          
Number of Redeemed LLC Units 443,474 479,380                      
Aggregate Payable for Redeemed Units | $ $ 315 $ 421                      
Redeemed LLC Units, Price Per Unit (in dollars per share) | $ / shares $ 0.711 $ 0.878                      
Executive Chairman [Member] | Restricted LLC Units [Member]                          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 940,669 967,830                      
Chief Executive Officer [Member]                          
Number of Redeemed LLC Units 483,301 470,330                      
Aggregate Payable for Redeemed Units | $ $ 344 $ 413                      
Redeemed LLC Units, Price Per Unit (in dollars per share) | $ / shares $ 0.711 $ 0.878                      
Chief Executive Officer [Member] | Restricted LLC Units [Member]                          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 540,633 470,330                      
Chief Executive Officer [Member] | Restricted Stock [Member]                          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 40,000 49,750                      
Series E Preferred Stock [Member]                          
Ratio of Shares To Vote                 10        
Preferred Stock, Shares Outstanding, Ending Balance (in shares)         4,983,557       4,983,557        
Preferred Stock, Shares Issued, Total (in shares)         4,983,557       4,983,557        
Series F Preferred Stock [Member]                          
Ratio of Shares To Vote       10                  
Preferred Stock, Shares Authorized (in shares)       25,000,000                  
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares       $ 0.001                  
Preferred Stock, Shares Issued, Total (in shares)                     22,429,541    
Series F Preferred Stock [Member] | Mr. Cohen [Member]                          
Stock Issued During Period, Shares, New Issues (in shares)       12,549,273                  
Series F Preferred Stock [Member] | DGC Trust [Member]                          
Stock Issued During Period, Shares, New Issues (in shares)       9,880,268                  
Series C Junior Participating Preferred Stock [Member]                          
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares     0.001                    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares     $ 100                    
Class of Warrant or Right, Exercise Trigger, Percentage of Common Stock Owned by Individual or Affiliates     4.95%