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Note 8 - Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure Text Block Supplement [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

		December 31,
		2013				2014
Interest on long-term debt			1,099,771				1,436,466
Administrative expenses			203,396				339,778
Vessel operating and voyage expenses			1,577,210				2,126,783
Total			2,880,377				3,903,027

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Tabular disclosure of the components of accrued liabilities.

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