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Note 6 - Other Assets (Details Textual) | Mar. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
--- | --- | ---
Number of Publicly Traded REITs in which Common Shares are Owned | 13 | 19
Number of Publicly Traded REITs in which Options are Owned | 4 | 10
Investments, Fair Value Disclosure, Total |  | $ 1,529,185
Marketable Securities, Total | $ 975,176 | 1,514,483
Marketable Securities, Real Estate Investment Trust [Member] |  |
Investments, Fair Value Disclosure, Total | 978,840 |
Marketable Securities, Real Estate Investment Trust [Member] | Covered Call Option Contract [Member] |  |
Derivative, Fair Value, Net, Total | $ 3,664 | $ 14,702

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- 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. + Details
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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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- 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 -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611 + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Amount of investment in marketable security. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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