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Note 8 - Notes Payable (Details Textual) - USD ($) | Aug. 17, 2020 | Apr. 22, 2020 | Jun. 30, 2025 | Dec. 31, 2024 | Aug. 15, 2024 | Dec. 31, 2023
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Promissory Note for Refinancing One Model Home [Member] | Majority Owned Subsidiary Dubose Model Home Investors 202 LP and 204 LP [Member] |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  | $ 300,000
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 8.00% | 5.55%
Economic Injury Disaster Loan [Member] |  |  |  |  |  |
Proceeds from Issuance of Unsecured Debt | $ 150,000 | $ 10,000 |  |  |  |
Loans Payable |  |  | $ 142,375 | $ 144,089 |  |

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