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Note 6 - Other Assets (Details Textual)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Number of Publicly Traded REITs in which Common Shares are Owned	20	18
Number of Publicly Traded REITs in which Options are Owned	2	3
Investments, Fair Value Disclosure		$ 798,206
Derivative, Fair Value, Net	$ 2,086
Marketable Securities	942,530	797,749
Marketable Securities, Real Estate Investment Trust [Member] | Covered Call Option Contract [Member]
Investments, Fair Value Disclosure	$ 944,616
Derivative, Fair Value, Net		$ 457

X

- Definition

Represents the number of publicly traded REITs in which the reporting entity owns common shares as of the specified date.

+ References

No definition available.

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- Definition

Represents the number of publicly traded REITs in which the reporting entity owns options as of the specified date.

+ References

No definition available.

+ Details

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X

- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482907/825-10-50-10

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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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- Definition

Amount of investment in marketable security.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.4)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

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