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Note 1 - Basis of Presentation and General Information (Tables)
 12 Months Ended
Dec. 31, 2013
Disclosure Text Block [Abstract]  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
   
Year ended December 31,
 
Charterer
 
2011
   
2012
   
2013
 
                   
Maersk Lines
    15.73 %     11.75 %     5.89 %
Klaveness
    13.59 %     10.71 %     8.54 %
Morgan Stanley      -        9.45 %      10.50 % 
MSC      4.04 %       4.42 %      10.16 %