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DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Textual)
1 Months Ended 12 Months Ended
Mar. 31, 2021
Jul. 19, 2019
USD ($)
a
ft²
units
Dec. 31, 2020
USD ($)
a
shares
Dec. 31, 2019
USD ($)
shares
SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation     39 years 6 months  
Depreciation expense for the corporate offices     $ 15,000 $ 15,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares     9,600 9,600
Percentage Of Increase In Extension Permit     5.00%  
Cash, Uninsured Amount     $ 327,000 $ 239,000
Cash, FDIC Insured Amount     250,000  
Operating Leases, Rent Expense, Minimum Rentals     $ 64,324  
Equity Method Investment, Ownership Percentage     49.00%  
Number of Units in Real Estate Property | units   318    
Fort Myers Florida [Member]        
Area of Land | a   17.5    
Development Costs, Period Cost   $ 54,080,000    
Area Of Land Available For Renting | ft²   312,000    
PNC Bank National Association [Member]        
Equity Method Investment, Underlying Equity in Net Assets   $ 14,490,000    
Debt Instrument, Face Amount   $ 41,590,000    
Murano At Three Oaks Associates LLC [Member]        
Equity Method Investment, Ownership Percentage   25.00%    
Equity Method Investment, Underlying Equity in Net Assets   $ 3,620,000    
US Treasury Securities [Member]        
Debt Securities, Trading, Restricted     $ 0 9,900,000
Collateral Pledged [Member]        
Debt Securities, Trading, Restricted     $ 0 $ 0
Cii [Member]        
Noncontrolling Interest, Ownership Percentage by Parent     95.00%  
Courtland Investment Inc [Member]        
Noncontrolling Interest, Ownership Percentage by Parent     95.00%  
260 River Corp [Member]        
Noncontrolling Interest, Ownership Percentage by Parent     70.00%  
Area of Land | a     6.01  
260 River Corp [Member] | Subsequent Event [Member]        
Date of completion of development of the property Mar. 31, 2021      
Percentage of ownership of leased property 28.00%      
Baleen Associates Inc [Member]        
Noncontrolling Interest, Ownership Percentage by Parent     50.00%  
HMG Atlanta LLC [Member]        
Noncontrolling Interest, Ownership Percentage by Parent     1.50%  
HMG Bayshore LLC [Member]        
Noncontrolling Interest, Description     This is a wholly owned Florida limited liability company which owns an investment in an entity which invests in mortgages secured by real estate.