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Note 13 - Voyage and Vessel Operating Expenses - Summary of Voyage, Vessel, Operating Expenses and Commissions (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Voyage expenses	$ 1,055,408	$ 1,261,088	$ 1,564,489
Vessel operating expenses	23,983,282	19,986,170	15,019,342
Port Charges and Canal Dues [Member]
Voyage expenses	251,197	384,893	1,156,511
Bunkers [Member]
Voyage expenses	804,211	876,195	407,978
Crew Wages and Related Costs [Member]
Vessel operating expenses	13,111,682	11,020,924	8,771,386
Insurance [Member]
Vessel operating expenses	1,844,088	1,537,539	1,261,976
Repairs and Maintenance [Member]
Vessel operating expenses	1,110,995	1,043,632	643,788
Lubricants [Member]
Vessel operating expenses	2,029,230	1,665,849	1,169,412
Spares and Consumable Stores [Member]
Vessel operating expenses	4,758,290	3,445,422	2,391,420
Professional and Legal Fees [Member]
Vessel operating expenses	259,311	252,156	10,037
Other Vessel Operating Expenses [Member]
Vessel operating expenses	$ 869,686	$ 1,020,648	$ 771,323

X

- Definition

Costs relating to the voyages performed by the vessels and may include port, canal, bunker expenses, commissions and other.

+ References

No definition available.

+ Details

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X

- Definition

Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense.

+ References

No definition available.

+ Details

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- Details

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