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Note 2 - Significant Accounting Policies (Details Textual)
 1 Months Ended 12 Months Ended
Sep. 22, 2023
shares
Jan. 31, 2023
USD ($)
Dec. 31, 2023
USD ($)
$ / shares
shares
Dec. 31, 2022
USD ($)
$ / shares
Amortization of above and below Market Leases     $ 5,000 $ 55,000
Impairment of Real Estate     2,398,097 (0)
Goodwill     1,574,000 2,423,000
Goodwill and Intangible Asset Impairment       0
Depreciation, Depletion and Amortization, Nonproduction     5,425,739 5,465,015
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents     6,510,428 16,516,725
Cash, Uninsured Amount     700,000 8,800,000
Restricted Cash     3,700,000 4,400,000
Accounts Receivable, Allowance for Credit Loss     92,000 138,000
Deferred Costs     1,700,000 1,500,000
Operating Lease, Initial Direct Cost Expense, over Term     500,000 400,000
Amortization of Debt Issuance Costs     345,880 240,090
Unamortized Deferred Stock Costs     5,000  
Deferred Offering Costs     $ 5,000 0
Percentage of Distributed Taxable Income to Qualify as REIT     90.00%  
Marketable Securities       797,749
Marketable Securities, Cost Basis     $ 40,315 900,000
Equity Securities, FV-NI     18,318,521 0
Equity Securities, FV-NI, Cost     7,500,000  
Liabilities, Fair Value Disclosure     $ 0 $ 0
Earnings Per Share, Basic (in dollars per share) | $ / shares     $ 0.68 $ (0.57)
Excise Tax Liability on Spac Redemptions, Percentage   1.00%    
Excise Tax Liability on Spac Redemptions, Amount   $ 1,140,683    
Conduit Pharmaceuticals Inc [Member]        
Stock Issued During Period, Shares, Acquisitions (in shares) | shares 65,000,000      
Common Class A [Member]        
Stock Redeemed or Called During Period, Shares (in shares) | shares     11,037,272  
Stock Redeemed or Called During Period, Value     $ 114,068,280  
Fair Value, Inputs, Level 1 [Member]        
Marketable Securities     45,149 $ 800,000
Cash Equivalents, at Carrying Value     0 136,900,000
Domestic Tax Authority [Member]        
Operating Loss Carryforwards     18,000,000  
Polar Multi-Strategy Master Fund [Member] | Notes Payable to Banks [Member]        
Debt Issuance Costs, Net     800,000 900,000
Amortization of Debt Issuance Costs     $ 300,000 $ 200,000
Building [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)     39 years  
NTR Property Management [Member]        
Goodwill, Gross     $ 1,300,000  
Goodwill     451,000  
Goodwill, Fair Value Disclosure     $ 451,000  
Discontinued Operations, Disposed of by Sale [Member]        
Number of Real Estate Properties     22 31
Proceeds from Sale of Real Estate     $ 11,700,000 $ 17,500,000
Gain (Loss) on Sale of Properties     $ 3,200,000 5,400,000
Commercial Property [Member]        
Number of Model Homes, Held for Sale     0  
Number of Real Estate Properties     12  
Model Home Properties [Member]        
Number of Model Homes, Held for Sale     15  
Impairment of Real Estate     $ 400,000  
Model Home Properties [Member] | Discontinued Operations, Disposed of by Sale [Member]        
Number of Real Estate Properties     8  
One Park Centre [Member]        
Impairment of Real Estate     $ 2,000,000  
Maximum [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)     5 years  
Maximum [Member] | Building [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)     39 years  
Maximum [Member] | Leasehold Improvements [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)     10 years  
Maximum [Member] | Furniture and Fixtures [Member]        
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  
Minimum [Member] | Leasehold Improvements [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)     1 year  
Minimum [Member] | Furniture and Fixtures [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)     4 years  
Lease Intangibles [Member]        
Amortization of Intangible Assets     $ 18,000 200,000
Lease Intangibles [Member] | Maximum [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)     10 years  
Finite-lived Intangibles, Other Than Lease Intangibles [Member]        
Amortization of Intangible Assets     $ 10,000 $ 100,000
Intangible Associated With NTR Property Management [Member]        
Impairment of Intangible Assets (Excluding Goodwill)     $ 800,000  
Murphy Canyon Acquisition Sponsor, LLC (SPAC) [Member]        
Subsidiary, Ownership Percentage, Parent     65.00%