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Note 7 - Long-term Debt (Details Textual) - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jul. 31, 2020
Debt Instrument, Deferred Debt Amount			$ 5,200,000
Restricted Cash, Total	$ 2,008,593	$ 4,410,376
Interest Expense, Total	$ 3,320,074	$ 2,272,181
Minimum [Member]
Debt Instrument Covenant, Ratio of Fair Value of Vessel to Outstanding Loan Less Cash in Retention Accounts	120.00%
Maximum [Member]
Debt Instrument Covenant, Ratio of Fair Value of Vessel to Outstanding Loan Less Cash in Retention Accounts	140.00%

X

- Definition

The ratio of fair value of vessels to outstanding loan less cash in retention accounts for debt instrument covenants.

+ References

No definition available.

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X

- Definition

The value amount of deferred debt instrument.

+ References

No definition available.

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X

- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

+ References

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- Definition

Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

+ References

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