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Note 5 - Investment in Joint Venture (Details Textual)
3 Months Ended
Mar. 31, 2024
USD ($)
Mar. 31, 2023
USD ($)
Dec. 31, 2023
USD ($)
a
Equity Method Investments $ 1,627,000   $ 1,608,000
Payments to Acquire Equity Method Investments 19,000 $ (0)  
Joint Venture Agreement With BRE2 LLC [Member]      
Area of Land (Acre) | a     30
Equity Method Investments     $ 1,600,000
Payments to Acquire Equity Method Investments $ 19,000