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Note 16 - Subsequent Events (Details Textual) | 1 Months Ended | 3 Months Ended | 12 Months Ended | 24 Months Ended | 60 Months Ended
--- | --- | --- | --- | --- | ---
Feb. 28, 2025 USD ($) | Mar. 27, 2025 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2023 USD ($)
Payments to Acquire Real Estate |  |  | $ 9,729,351 | $ 21,909,963 |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Investment Property, Net |  |  | 127,596,000 |  |  |
Gains (Losses) on Sales of Investment Real Estate |  |  | $ 3,426,572 | $ 3,240,200 |  |
Model Homes [Member] |  |  |  |  |  |
Payments to Acquire Real Estate |  |  |  |  |  | $ 2,200,000
Subsequent Event [Member] | Model Homes [Member] |  |  |  |  |  |
Proceeds from Sale of Real Estate |  | $ 2,400,000 |  |  |  |
Number of Model Homes Sold |  | 5 |  |  |  |
Union Town Center and Research Parkway [Member] |  |  |  |  |  |
Payments to Acquire Real Estate |  |  |  |  | $ 14,100,000 |
Union Town Center and Research Parkway [Member] | Subsequent Event [Member] |  |  |  |  |  |
Real Estate Property, Consideration Transferred, Total | $ 16,950,000 |  |  |  |  |
Proceeds from Sale of Real Estate | 6,370,000 |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Investment Property, Net | 11,600,000 |  |  |  |  |
Gains (Losses) on Sales of Investment Real Estate | $ 4,000,000 |  |  |  |  |

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- Definition The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(9)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(7)(a)(8)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(14)(d)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 3 -SubTopic 360 -Topic 944 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477875/944-360-45-3 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 4 -SubTopic 360 -Topic 944 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477875/944-360-45-4 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 360 -Topic 944 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478586/944-360-50-1 + Details
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