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Note 7 - Real Estate - Real Estate Disclosure (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Net Realizable Value at beginning of period	$ 36,201,270	$ 33,016,665
Increase (decrease) in net realizable value	12,068,730	3,984,605
Net Realizable Value at December 31,	48,270,000	36,201,270
Cortlandt Manor Medical Center [Member]
Increase (decrease) in net realizable value	2,010,000	1,040,000
Flowerfield Properties, Inc. [Member]
Increase (decrease) in net realizable value	10,058,730	2,944,605
Port Jefferson Professional Park [Member]
Increase (decrease) in net realizable value		$ (800,000)
Net Realizable Value at December 31,	$ 48,270,000

X

- Definition

Amount of increase (decrease) before accumulated depreciation of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity.

+ References

No definition available.

+ Details

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X

- Definition

Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(f))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

+ Details

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X

- Details

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- Details

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- Details

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