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Note 6 - Vessels, Net (Details) - Summary of Vessels, Net - USD ($)	6 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summary of Vessels, Net [Abstract]
Balance, December 31		$ 895,387,989		$ 849,452,594
Balance, December 31	$ (201,940,961)	(201,940,961)	$ (184,035,144)	(172,429,692)
Balance, December 31		711,352,845		677,022,902
Acquisitions (transfer from Advances for Vessels under Construction)		200,159,411	101,459,533
Disposals		(1,977,051)	(39,075,007)
Disposals			11,925,771
Disposals	(1,977,051)	(1,977,051)	(27,149,236)
Impairement loss		(26,190,677)	(16,449,131)
Impairement loss		17,951,690	10,280,384
Impairement loss	(6,775,416)	(8,238,987)	(6,168,747)	$ 0
Vessel held for sale		(748,823)
Vessel held for sale		(748,823)
Depreciation for the year	(35,857,507)	(35,857,507)	(33,811,607)
Balance, December 31	1,066,630,849	1,066,630,849	895,387,989
Balance, December 31	$ 864,689,888	$ 864,689,888	$ 711,352,845

X

- Definition

Amount of decrease in accumulated depreciation, depletion and amortization as a result of the impairment of property, plant and equipment.

+ References

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land or leased assets).

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Amount of decrease in accumulated depreciation, depletion and amortization as a result of sale or disposal of property, plant and equipment.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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