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Note 2 - Significant Accounting Policies (Details Textual)
 3 Months Ended 6 Months Ended
Jun. 30, 2022
USD ($)
Mar. 31, 2022
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Amortization of above and below Market Leases $ 14,000   $ 3,000 $ 27,000 $ 2,000  
Amortization of Intangible Assets 50,000   100,000 100,000 200,000  
Deferred Costs, Total 1,100,000     1,100,000   $ 1,400,000
Operating Lease, Initial Direct Cost Expense, over Term 100,000   $ 100,000 200,000 $ 200,000  
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Ending Balance 21,066,945     21,066,945   14,702,089
Restricted Cash, Total 4,300,000     4,300,000   4,700,000
Cash, Uninsured Amount $ 13,500,000     $ 13,500,000   7,300,000
Number of Real Estate Properties Held for Sale 1     1    
Unamortized Deferred Stock Costs $ 117,000     $ 117,000   135,000
Marketable Securities, Total 984,201     984,201   1,514,483
Marketable Securities, Cost Basis 1,100,000     1,100,000   1,600,000
Fair Value, Inputs, Level 1 [Member]            
Marketable Securities, Total $ 1,000,000.0     $ 1,000,000.0   $ 1,500,000
Model Home [Member]            
Number of Real Estate Properties Held for Sale 5     5    
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%     23.50%