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Note 5 - Lease Intangibles (Details Textual) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets, Gross, Total	$ 4,110,139	$ 5,200,728
Finite-Lived Intangible Assets, Accumulated Amortization	3,800,102	4,559,510
Below Market Lease, Net, Ending Balance	86,852	139,045
Real Estate Assets Held for Sale [Member]
Finite-Lived Intangible Assets, Gross, Total	0.0	1,100,000
Finite-Lived Intangible Assets, Accumulated Amortization	$ 0.0	$ 1,100,000

X

- Definition

Amount after amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life.

+ References

No definition available.

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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-Publisher FASB
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-Topic 350
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-Paragraph 2
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