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Note 17 - Investment in Joint Venture (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Mar. 31, 2012
Investment in Joint Venture, Total Maximum Investment by Members	$ 175,000,000
Conversion Ratio, Company Market Value Multiplier				0.925
Revenue from Related Parties	240,000	240,000
Payments to Acquire Equity Method Investments	3,750,000
Equity Method Investment, increase in maximum investment	18,750,000
Income (Loss) from Equity Method Investments	(1,219,692)	(2,415)	(538,833)
Equity Method Investments	16,989,061	14,458,762
Euroseas Ltd (Member)
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures, Maximum Investment	25,000,000
Equity Method Investment, Ownership Percentage, Maximum Percentage	14.286%
Elton Park and Rhone [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures, Maximum Investment	$ 75.0
Equity Method Investment, Ownership Percentage, Maximum Percentage	42.857%

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Ratio of the Company's Market Value multiplied by certain rate

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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

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-URI http://asc.fasb.org/extlink&oid=16382449



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