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Note 2 - Significant Accounting Policies (Details Textual)
 1 Months Ended 9 Months Ended 12 Months Ended
Apr. 22, 2024
$ / shares
shares
May 31, 2025
USD ($)
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
$ / shares
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Jan. 24, 2025
shares
Amortization of above and below Market Leases       $ 4,753 $ 4,641  
Amortization of Intangible Assets       0 300,000  
Impairment of Real Estate       6,371,437 1,784,311  
Depreciation, Depletion and Amortization, Nonproduction       4,862,267 5,515,518  
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation       7,422,359 8,036,496  
Cash, Uninsured Amount       1,300,000 1,000,000  
Restricted Cash       5,700,000 5,000,000  
Accounts Receivable, Allowance for Credit Loss       0 0  
Deferred Costs       1,300,000 1,700,000  
Operating Lease, Initial Direct Cost Expense, over Term       500,000 500,000  
Amortization of Debt Issuance Costs       281,245 351,291  
Deferred Offering Costs       $ 279,603 0  
Percentage of Distributed Taxable Income to Qualify as REIT       90.00%    
Marketable Securities       $ 0    
Marketable Securities, Cost Basis       0    
Liabilities, Fair Value Disclosure       0 0  
Equity Securities, FV-NI       $ 3,900 $ 206,177  
Earnings Per Share, Basic (in dollars per share) | $ / shares       $ (8.65) $ (22.5)  
Conduit Pharmaceuticals Inc [Member]            
Equity Securities, FV-NI       $ 3,900    
Conduit Pharmaceuticals Inc [Member] | Private Warrants [Member]            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares 540,000     540,000    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares $ 3.12          
Warrants and Rights Outstanding, Term (Year) 2 years          
Warrant or Right, Exercisable Period (Year) 1 year          
Conduit Pharmaceuticals Inc [Member]            
Lock-up Agreement, Shares (in shares) | shares 2,700,000          
Investment Owned, Balance, Shares (in shares) | shares 4,015,250       2,944,514 29,445
Equity Securities, FV-NI       $ 3,900 $ 200,000  
Conduit Pharmaceuticals Inc [Member] | CDT Common Stock [Member]            
Proceeds from Sale, Maturity and Collection of Investments   $ 13,990 $ 13,990      
Fair Value, Inputs, Level 1 [Member]            
Marketable Securities       0    
Domestic Tax Jurisdiction [Member]            
Estimated Future Operating Loss Carryforwards       27,100,000    
Polar Multi-Strategy Master Fund [Member] | Notes Payable to Banks [Member]            
Debt Issuance Costs, Net       700,000 700,000  
Amortization of Debt Issuance Costs       $ 281,245 351,291  
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, Impairment Loss       $ 72,000    
Commercial Property [Member]            
Number of Properties Classified as Held for Sale       1    
Impairment of Real Estate       $ 6,000,000    
Model Home [Member]            
Number of Properties Classified as Held for Sale       5    
Impairment of Real Estate       $ 300,000    
Dakota Center [Member]            
Impairment of Real Estate       3,500,000    
Shea Center II [Member]            
Impairment of Real Estate       $ 2,500,000    
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] | Maximum [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)       10 years    
Lease Agreements [Member]            
Amortization of Intangible Assets       $ 15,670 $ 17,526