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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