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Note 6 - Vessels, Net and Vessels Held for Sale (Detail) - Vessels, Net and Vessels Held for Sale (USD $)			9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Vessel Cost [Member]	Sep. 30, 2012 Vessel Accumulated Depreciation [Member]	Sep. 30, 2012 Vessel Net Book Value [Member]
Balance, December 31, 2011			$ 729,452,091
Balance, December 31, 2011				(115,619,118)
Balance, December 31, 2011	641,968,871	613,832,973			613,832,973
Balance, September 30, 2012			776,302,667
Balance, September 30, 2012				(134,333,796)
Balance, September 30, 2012	641,968,871	613,832,973			641,968,871
Additions / transfers from vessels under construction			65,661,576		65,661,576
Additions / transfers from vessels under construction			65,661,576		65,661,576
Vessel disposal			(18,811,000)
Vessel disposal				2,727,787
Vessel disposal					(16,083,213)
Depreciation for the period				(21,442,465)
Depreciation for the period					$ (21,442,465)

X

- Definition

Property Plant And Equipment Disposals Net

+ References

No definition available.

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X

- Definition

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 14

-Article 5



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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

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-Paragraph 5

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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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The change during the period, from the beginning balance of accumulated depreciation, depletion and amortization (relating to property, plant and equipment) to the ending balance.

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The decrease in accumulated depreciation, depletion and amortization (relating to property, plant and equipment) as a result of sales or disposals of property, plant and equipment during the period.

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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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Divestiture 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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Amount, net of accumulated depreciation, depletion and amortization, 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.

+ References

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-Name Regulation S-X (SX)

-Number 210

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-Paragraph 8

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