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Note 8 - Investments, Including Investments Accounted for Using the Equity Method (Details Textual) - USD ($)
 1 Months Ended 3 Months Ended 4 Months Ended 12 Months Ended
Jan. 25, 2022
Sep. 14, 2021
Jan. 25, 2021
Jan. 20, 2021
Oct. 26, 2020
May 31, 2018
Dec. 31, 2017
Oct. 31, 2020
Jan. 31, 2018
Mar. 31, 2022
Nov. 30, 2020
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Oct. 02, 2020
Payments to Acquire Equity Method Investments                       $ 45,094,500 $ 55,000,000    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)                       $ 9.95 $ 9.95 $ 9.95  
Payments to Acquire Investments, Total                       $ 115,538,250 $ 1,647,677,193    
Deconsolidation, Gain (Loss), Amount                       24,977,740 0    
Deconsolidation, Gain (Loss), Recognized, Amount                       10,010,090 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                        
Business Combination Agreement with SHG [Member]                              
Payments to Acquire Businesses, Gross   $ 55,000,000                          
Business Acquisition, Backstop Agreed to Be Provided to Acquiree, Maximum Value $ 45,000,000                            
Business Acquisition, Backstop Agreed to Be Provided to Acquiree, Price Per Share (in dollars per share) $ 10                            
Yellowstone Acquisition Company [Member]                              
Proceeds from Issuance Initial Public Offering               $ 125,000,000              
BOC Yellowstone LLC [Member] | Non-redeemable Private Placement Warrants [Member]                              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)                     $ 11.50        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                     7,719,779        
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)                     1        
IPO [Member] | Yellowstone Acquisition Company [Member]                              
Units Issued During Period, Number (in shares)               13,598,898              
Units Issued During Period, Price Per Unit (in dollars per share)               $ 10.00              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)               11.50              
Sale of Unit, Price Per Unit (in dollars per share)               $ 10.00              
IPO [Member] | Yellowstone Acquisition Company Warrants [Member]                              
Units Issued During Period, Number of Warrants (in shares)               0.5              
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                      
Common Class A [Member] | IPO [Member] | Yellowstone Acquisition Company [Member]                              
Stock Issued During Period, Shares, New Issues (in shares)         13,598,898                    
Units Issued During Period, Number of Common Stock, Shares (in shares)               1              
Unconsolidated Affiliates [Member]                              
Equity Method Investments                       $ 535,388      
Unconsolidated Affiliates [Member] | Minimum [Member]                              
Equity Method Investment, Ownership Percentage                       16.00%      
Unconsolidated Affiliates [Member] | Maximum [Member]                              
Equity Method Investment, Ownership Percentage                       30.00%      
The 24th Street Fund I, LLC [Member]                              
Equity Method Investment, Ownership Percentage                   49.90%          
Payments to Acquire Equity Method Investments                           $ 6,000,000  
Yellowstone Acquisition Company [Member]                              
Equity Method Investment, Ownership Percentage                     20.00%        
Sky Harbour Group Corporation [Member]                              
Payments to Acquire Equity Method Investments   $ 55,000,000                          
Sky Harbour Group Corporation Class A Common Stock [Member]                              
Equity Method Investment, Ownership Percentage                   22.96%   22.96%      
Payments to Acquire Equity Method Investments $ 45,000,000                            
Equity Method Investment, Shares, Converted from Other Equity (in shares) 5,500,000                            
Equity Method Investment, Price Per Share (in dollars per share) $ 10                            
Equity Method Investment, Shares (in shares) 4,500,000                 13,118,474   13,118,474      
Deconsolidation, Gain (Loss), Amount                   $ 24,977,740          
Deconsolidation, Gain (Loss), Recognized, Amount                   10,000,000          
Deconsolidation, Gain (Loss), Assets and Liabilities                   $ 15,000,000          
Equity Method Investment, Quoted Market Value                       $ 34,900,000      
Equity Method Investments, Price Per Share (in dollars per share)                       $ 8.15      
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                       $ 0 $ 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                      
Class B Common Stock of Yellowstone Acquisition Company [Member] | BOC Yellowstone LLC [Member]                              
Payments to Acquire Investments, Total                     $ 7,800,000        
Investment Owned, Balance, Shares (in shares)                     3,399,724