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Note 13 - Segments - Assets by Reportable Segment (Details) - USD ($)
Mar. 31, 2025
Dec. 31, 2024
Total assets $ 135,424,916 $ 142,569,650
Cash, cash equivalents and restricted cash 11,956,853 8,036,496
Other assets, net 18,058,901 14,973,150
Operating Segments [Member]    
Total assets 119,293,572 131,133,231
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]    
Cash, cash equivalents and restricted cash 4,980,910 564,922
Other assets, net 11,150,434 10,871,497
Office/Industrial Properties [Member] | Operating Segments [Member]    
Land, buildings and improvements, net [1] 73,912,734 74,425,180
Total assets [2] 74,742,379 76,292,662
Model Home Properties [Member] | Operating Segments [Member]    
Land, buildings and improvements, net [1] 38,865,349 37,416,000
Total assets [2] 39,778,198 38,166,964
Retail Properties [Member] | Operating Segments [Member]    
Land, buildings and improvements, net [1] 4,577,635 15,743,789
Total assets [2] $ 4,772,995 $ 16,673,605
[1] Includes lease intangibles and the land purchase option related to property acquisitions.
[2] Includes land, buildings and improvements, cash, cash equivalents, and restricted cash, current receivables, deferred rent receivables and deferred leasing costs and other related intangible assets, all shown on a net basis.