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Note 5 - Lease Intangibles - Net Value of Other Intangibles (Details) - USD ($) | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Lease intangibles, gross | $ 4,110,139 | $ 4,110,139
Accumulated Amortization | (4,072,836) | (4,055,310)
Lease Intangibles, net | 37,303 | 54,829
Leases, Acquired-in-Place [Member] |  |
Lease intangibles, gross | 2,515,264 | 2,515,264
Accumulated Amortization | (2,495,016) | (2,485,234)
Lease Intangibles, net | 20,248 | 30,030
Leasing Costs [Member] |  |
Lease intangibles, gross | 1,261,390 | 1,261,390
Accumulated Amortization | (1,244,335) | (1,236,591)
Lease Intangibles, net | 17,055 | 24,799
Above Market Lease [Member] |  |
Lease intangibles, gross | 333,485 | 333,485
Accumulated Amortization | (333,485) | (333,485)
Lease Intangibles, net | $ 0 | $ 0

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