Note 1 - Basis of Presentation and General Information (Details) - Charterers that Individually Accounted for More Than 10% of the Company's Voyage and Time Charter Revenues	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Maersk Lines [Member]
Concentration Risk [Line Items]
Percentage of Revenue by Charterer	5.89%	11.75%	15.73%
Klaveness [Member]
Concentration Risk [Line Items]
Percentage of Revenue by Charterer	8.54%	10.71%	13.59%
Morgan Stanley [Member]
Concentration Risk [Line Items]
Percentage of Revenue by Charterer	10.50%	9.45%
MSC [Member]
Concentration Risk [Line Items]
Percentage of Revenue by Charterer	10.16%	4.42%	4.04%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

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-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

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