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Note 2 - Significant Accounting Policies (Details Textual)
 3 Months Ended
Mar. 31, 2022
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
Amortization of above and below Market Leases $ 13,000 $ 1,000  
Amortization of Intangible Assets 52,000 116,000  
Deferred Costs, Total 1,100,000   $ 1,300,000
Operating Lease, Initial Direct Cost Expense, over Term 95,000 $ 85,000  
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Ending Balance 22,494,595   14,702,089
Restricted Cash, Total 4,600,000   4,700,000
Cash, Uninsured Amount $ 15,200,000   7,300,000
Number of Real Estate Properties Held for Sale 1    
Unamortized Deferred Stock Costs $ 75,000,000,000   135,000,000,000
Marketable Securities, Total 975,176   1,514,483
Marketable Securities, Cost Basis 1,000,000.0   1,600,000
Fair Value, Inputs, Level 1 [Member]      
Marketable Securities, Total $ 1,000,000.0   $ 1,500,000
Model Home [Member]      
Number of Real Estate Properties Held for Sale 4    
Maximum [Member]      
Amortization of Value In Place Leases (Year) 10 years    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year) 5 years    
Minimum [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year) 1 year    
SPAC, Murphy Canyon Acquisition Corp. [Member]      
Equity Method Investment, Ownership Percentage 23.50%