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Note 12 - Segments - Operating Income by Segment (Details) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Rental, fees and other income $ 17,635,614 $ 17,764,281
Property and related expenses (5,962,918) (5,841,396)
Goodwill impairment (849,000) 0
General and administrative expenses (6,790,432) (6,163,816)
Depreciation and amortization (5,425,739) (5,465,015)
Interest expense (5,004,889) (4,712,487)
Gain on deconsolidation of SPAC (see footnote 9) 40,321,483 0
Other income, net 20,878 21,075
Income tax expense 335,780 (1,215,873)
Gain on sale of real estate 3,240,200 5,079,912
Net income 13,177,526 1,485,528
All Other Than Conduit [Member]    
Gain (loss) on marketable securities 1,414,420 2,018,847
Conduit Pharmaceuticals Inc [Member]    
Gain (loss) on marketable securities (23,359,774) 0
Operating Segments [Member]    
Net operating income, as defined 9,274,599 11,922,885
Office/Industrial Properties [Member] | Operating Segments [Member]    
Rental, fees and other income 11,648,034 12,702,986
Property and related expenses (7,264,029) (5,148,110)
Net operating income, as defined 4,384,005 7,554,876
Model Home Properties [Member] | Operating Segments [Member]    
Rental, fees and other income 4,132,130 2,909,871
Property and related expenses (588,477) (102,660)
Net operating income, as defined 3,543,653 2,807,211
Retail Properties [Member] | Operating Segments [Member]    
Rental, fees and other income 1,884,330 2,224,479
Property and related expenses (537,389) (663,681)
Net operating income, as defined $ 1,346,941 $ 1,560,798