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Note 11 - Financial Instruments - Gain or Loss on Derivatives Not Designated as Hedging Instruments (Details) - Not Designated as Hedging Instrument [Member] - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Gain (loss) on derivatives	$ (564,631)	$ (2,885)
Interest Rate Contracts, Unrealized (Loss) / Gain [Member]
Gain (loss) on derivatives	(582,850)	41,435
Interest Rate Contracts, Realized (Loss) / Gain [Member]
Gain (loss) on derivatives	$ 18,219	$ (44,320)

X

- Definition

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4CC
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL109998890-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959

+ Details

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- Details

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- Details

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- Details

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