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Note 4 - Sale of Controlling Interest in Real Estate Subsidiary (Details Textual) - USD ($)
Jun. 27, 2019
Dec. 31, 2019
Aug. 29, 2019
Jun. 26, 2019
Mt. Melrose LLC [Member]        
Noncontrolling Interest, Ownership Percentage by Parent       100.00%
Mt. Melrose LLC [Member]        
Equity Method Investment, Ownership Percentage 35.00% 35.00% 20.80%  
Distribution Made to Limited Liability Company (LLC) Member, Percentage of Distribution 67.00%      
Equity Method Investment, Underlying Equity in Net Assets $ 53,846      
Equity Method Investment, Realized Gain (Loss) on Disposal, Total $ (4,157,809)      
Mt. Melrose LLC [Member] | Woodmont [Member]        
Equity Method Investment, Ownership Percentage     79.20%  
Distribution Made to Limited Liability Company (LLC) Member, Percentage of Distribution 33.00%      
Mt. Melrose LLC [Member] | Minimum [Member]        
Distribution Made to Limited Liability Company (LLC) Member, Cumulative Amount For Percentage Range $ 2,000,000      
Mt. Melrose LLC [Member] | Maximum [Member]        
Distribution Made to Limited Liability Company (LLC) Member, Cumulative Amount For Percentage Range $ 3,000,000      
Mt. Melrose LLC [Member] | Woodmont [Member]        
Percentage of Membership Interest in Subsidiary Sold 65.00%      
Proceeds from Divestiture of Interest in Consolidated Subsidiaries $ 100,000      
Equity Method Investment, Ownership Percentage     20.80%