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Note 5 - Lease Intangibles - Net Value of Other Intangibles (Details) - USD ($) | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Lease intangibles, gross | $ 5,200,728 | $ 5,200,728
Accumulated Amortization | (4,683,664) | (4,559,510)
Lease Intangibles, net | 517,064 | 641,218
Leases, Acquired-in-Place [Member] |  |
Lease intangibles, gross | 3,136,587 | 3,136,587
Accumulated Amortization | (2,826,071) | (2,757,530)
Lease Intangibles, net | 310,516 | 379,057
Leasing Costs [Member] |  |
Lease intangibles, gross | 1,730,656 | 1,730,656
Accumulated Amortization | (1,548,144) | (1,510,559)
Lease Intangibles, net | 182,512 | 220,097
Above Market Lease [Member] |  |
Lease intangibles, gross | 333,485 | 333,485
Accumulated Amortization | (309,449) | (291,421)
Lease Intangibles, net | $ 24,036 | $ 42,064

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