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Note 2 - Significant Accounting Policies - Assets Measured on a Nonrecurring Basis (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Total Assets, impairment loss | $ 1,969,311 | $ 3,247,097
Fair Value, Nonrecurring [Member] |  |
Certain Real Estate assets | 18,065,871 | 12,503,176
Certain Real Estate assets, impairment loss | 1,784,311 | 2,398,097
Total Assets | 19,454,871 | 14,077,176
Total Assets, impairment loss | 1,969,311 | 3,247,097
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Certain Real Estate assets | 0 | 0
Total Assets | 0 | 0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Certain Real Estate assets | 0 | 0
Total Assets | 0 | 0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Certain Real Estate assets | 18,065,871 | 12,503,176
Total Assets | 19,454,871 | 14,077,176
Fair Value, Nonrecurring [Member] | Dubose Model Homes [Member] |  |
Goodwill | 1,123,000 | 1,123,000
Goodwill, impairment loss | 0 | 0
Fair Value, Nonrecurring [Member] | Dubose Model Homes [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Goodwill | 0 | 0
Fair Value, Nonrecurring [Member] | Dubose Model Homes [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Goodwill | 0 | 0
Fair Value, Nonrecurring [Member] | Dubose Model Homes [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Goodwill | 1,123,000 | 1,123,000
Fair Value, Nonrecurring [Member] | NTR Property Management [Member] |  |
Goodwill | 266,000 | 451,000
Goodwill, impairment loss | 185,000 | 849,000
Fair Value, Nonrecurring [Member] | NTR Property Management [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Goodwill | 0 | 0
Fair Value, Nonrecurring [Member] | NTR Property Management [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Goodwill | 0 | 0
Fair Value, Nonrecurring [Member] | NTR Property Management [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Goodwill | $ 266,000 | $ 451,000

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