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Note 13 - Sale of 555 Building (Details Textual) - USD ($)		3 Months Ended		9 Months Ended
	Jul. 26, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Proceeds from Sale of Buildings				$ 23,075,477	$ 0
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property		$ 6,894,109	$ 0	$ 6,894,109	$ 0
The Premises at 555 N Research Place, Central Islip, NY [Member]
Proceeds from Sale of Buildings	$ 24,360,000
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	6,894,109
Proceeds from Sale of Buildings, Net	14,000,000
The Premises at 555 N Research Place, Central Islip, NY [Member] | HSBC Bank Second Mortgage Loan [Member]
Repayments of Debt	$ 9,352,719

X

- Definition

The cash inflow from sale of buildings, net of cash outflows.

+ References

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- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
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-SubTopic 10
-Section 45
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+ References

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