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Note 13 - Segments - Net Operating Income (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Rental revenue | $ 14,024,626 | $ 15,742,091
Recovery revenue | 2,446,292 | 2,781,722
Other operating revenue | 343,790 | 401,462
Total revenue | 16,814,708 | 18,925,275
Rental operating costs | 6,158,052 | 6,256,077
Net Operating Income (NOI) | 10,656,656 | 12,669,198
Impairments | (6,371,437) | (1,784,311)
Adjusted NOI | 11,267,481 | 15,689,396
Operating Segments [Member] | Retail Properties [Member] |  |
Rental revenue | 487,161 | 1,595,464
Recovery revenue | 56,439 | 463,158
Other operating revenue | 400 | 62,041
Total revenue | 544,000 | 2,120,663
Rental operating costs | 115,047 | 608,667
Net Operating Income (NOI) | 428,953 | 1,511,996
Adjusted NOI | 428,953 | 1,511,996
Operating Segments [Member] | Office/Industrial Properties [Member] |  |
Rental revenue | 9,585,303 | 9,778,458
Recovery revenue | 2,389,853 | 2,318,564
Other operating revenue | 257,414 | 241,530
Total revenue | 12,232,570 | 12,338,552
Rental operating costs | 6,423,862 | 6,136,564
Net Operating Income (NOI) | 5,808,708 | 6,201,988
Adjusted NOI | 5,808,708 | 6,201,988
Operating Segments [Member] | Model Home Properties [Member] |  |
Rental revenue | 3,952,162 | 4,368,169
Recovery revenue | 0 | 0
Other operating revenue | 5,776 | 68,084
Total revenue | 3,957,938 | 4,436,253
Rental operating costs | 212,817 | 171,621
Net Operating Income (NOI) | 3,745,121 | 4,264,632
Gain on Sale - Model Homes | 950,434 | 3,426,572
Impairments | (339,609) | (406,374)
Adjusted NOI | 4,355,946 | 7,284,830
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] |  |
Rental revenue | 0 | 0
Recovery revenue | 0 | 0
Other operating revenue | 80,200 | 29,807
Total revenue | 80,200 | 29,807
Rental operating costs | (593,674) | (660,775)
Net Operating Income (NOI) | 673,874 | 690,582
Adjusted NOI | $ 673,874 | $ 690,582

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