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Note 4 - Vessels (Tables)
6 Months Ended
Jun. 30, 2017
Notes Tables  
Schedule Of Vessel And Vessel Improvements [Table Text Block]
Vessels and Vessel Improvements, at December 31, 2016
  $
567,592,950
 
Advance paid for purchase of Singapore Eagle at December 31, 2016
   
1,926,886
 
Purchase of Vessels and Vessel Improvements
   
121,331,815
 
Transfer to vessels held for sale
   
(15,210,204
)
Vessel depreciation expense
   
(13,461,924
)
Vessels and Vessel Improvements, at June 30, 2017
  $
662,179,523