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Note 1 - Organization and Basis of Presentation (Details Textual) | 12 Months Ended
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Dec. 31, 2023 USD ($) ft² | Dec. 31, 2022 USD ($) ft²
Number of Limited Liability Companies | 2 |
Number of Limited Partnerships in which Company is Sole General Partner | 5 |
Long-Term Debt, Maturity, Year One | $ 23,491,706 |
Number of Reportable Segments | 3 |
Restricted Cash | $ 3,700,000 | $ 4,400,000
Customer Concentration Risk [Member] | Rental Income [Member] |  |
Number of Tenants | 1 | 1
Customer Concentration Risk [Member] | Rental Income [Member] | One Tenant [Member] |  |
Concentration Risk, Percentage | 6.43% | 8.57%
Mortgage Notes [Member] |  |
Long-Term Debt, Maturity, Year One | $ 23,500,000 |
Model Home Properties [Member] |  |
Number of Limited Partnerships in which Company is Sole General Partner | 6 |
Commercial Property [Member] |  |
Number of Real Estate Properties, Fee Simple | 12 |
Commercial Property [Member] | Partially Owned Properties [Member] |  |
Number of Real Estate Properties, Fee Simple | 2 |
Model Home Properties [Member] | Mortgage Notes [Member] |  |
Long-Term Debt, Maturity, Year One | $ 13,100,000 |
Shea Center II [Member] |  |
Restricted Cash | $ 1,100,000 | $ 1,100,000
Area of Real Estate Property (Square Foot) | ft² | 45,535 | 45,535

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