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Note 5 - Lease Intangibles - Net Value of Other Intangibles (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Lease intangibles, gross	$ 4,110,139	$ 4,110,139
Accumulated Amortization	(4,059,692)	(4,055,310)
Lease Intangibles, net	50,447	54,829
Leases, Acquired-in-Place [Member]
Lease intangibles, gross	2,515,264	2,515,264
Accumulated Amortization	(2,487,680)	(2,485,234)
Lease Intangibles, net	27,584	30,030
Leasing Costs [Member]
Lease intangibles, gross	1,261,390	1,261,390
Accumulated Amortization	(1,238,527)	(1,236,591)
Lease Intangibles, net	22,863	24,799
Above Market Lease [Member]
Lease intangibles, gross	333,485	333,485
Accumulated Amortization	(333,485)	(333,485)
Lease Intangibles, net	$ 0	$ 0

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(16))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
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-Section 50
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-Publisher FASB
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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 928
-SubTopic 340
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
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-URI https://asc.fasb.org//1943274/2147483154/926-20-50-5

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