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Note 3 - Vessels (Tables)
3 Months Ended
Mar. 31, 2016
Notes Tables  
Schedule Of Vessel And Vessel Improvements [Table Text Block]
         
Vessels and Vessel Improvements, at December 31, 2015
  $ 733,960,731  
Purchase of Vessel Improvements
    112,488  
Depreciation Expense
    (8,879,086
)
Vessel Impairment Charge
    (6,167,262
)
Vessels and Vessel Improvements, at March 31, 2016
  $ 719,026,871