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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

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