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Note 8 - Investments, Including Investments Accounted for Using the Equity Method (Details Textual) - USD ($)
1 Months Ended 9 Months Ended 12 Months Ended
Jan. 25, 2022
Sep. 14, 2021
Jan. 25, 2021
Jan. 20, 2021
May 31, 2018
Dec. 31, 2017
Jan. 31, 2018
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2020
Mar. 31, 2022
Oct. 02, 2020
Payments to Acquire Equity Method Investments               $ 45,000,000 $ (0)      
Dream Finders Holdings, LLC [Member] | Term Loan Receivable [Member]                        
Notes Receivable, Related Parties                       $ 20,000,000
Note Receivable, Interest Rate                       14.00%
Dream Finders Homes, Inc. [Member]                        
Proceeds from Collection of Notes Receivable     $ 20,567,776                  
Common Class A [Member] | IPO [Member] | Dream Finders Homes, Inc. [Member]                        
Stock Issued During Period, Shares, New Issues (in shares)       9,600,000                
Shares Issued, Price Per Share (in dollars per share)       $ 13.00                
Unconsolidated Affiliates [Member] | Minimum [Member]                        
Equity Method Investment, Ownership Percentage               16.00%        
Unconsolidated Affiliates [Member] | Maximum [Member]                        
Equity Method Investment, Ownership Percentage               30.00%        
Logic Real Estate Companies and 24th Street Holding Company [Member]                        
Equity Method Investments               $ 845,233        
The 24th Street Fund I, LLC [Member]                        
Equity Method Investment, Ownership Percentage                     49.90%  
Payments to Acquire Equity Method Investments                   $ 6,000,000    
Sky Harbour Group Corporation [Member]                        
Payments to Acquire Equity Method Investments $ 4,500,000 $ 55,000,000                    
Equity Method Investment, Shares, Converted from Other Equity (in shares) 5,500,000                      
Equity Method Investment, Price Per Share (in dollars per share) $ 10                      
SHG Corporation [Member]                        
Payments to Acquire Equity Method Investments   $ 45,000,000                    
Breezeway Homes Inc. [Member]                        
Preferred Stock, Dividend Rate, Per-Dollar-Amount (in dollars per share)             $ 2,665          
Preferred Stock [Member] | Breezeway Homes Inc. [Member]                        
Debt Conversion, Converted Instrument, Shares Issued (in shares)             31,227          
Voting Common Stock of Privately Held Company CB&T Holding Corporation [Member]                        
Payments to Acquire Long-term Investments         $ 19,058,485              
Cost Method Investment, Ownership Percentage         15.60%              
Equity Investments [Member]                        
Other than Temporary Impairment Losses, Investments, Total               $ 0        
Non-voting Common Units of Dream Finders Holdings, LLC [Member]                        
Payments to Acquire Long-term Investments           $ 10,000,000            
Cost Method Investment, Ownership Percentage           5.60%            
DFH Class A Common Stock [Member]                        
Equity Securities, FV-NI, Shares, Acquired from Conversion (in shares)       4,681,099                
Equity Securities, FV-NI, Shares, Purchase (in shares)       120,000                
Equity Securities, FV-NI, Shares, Purchase, Price Per Share (in dollars per share)       $ 13.00                
Equity Method Investment, Shares (in shares)               456,328