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Note 5 - Vessels (Tables)
 12 Months Ended
Dec. 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 and Vessel Improvements
    
19,860,401
  
Disposal of Vessels
    
(13,102,860
)
Reclassification to vessels held for sale
   
(8,688,601
)
Depreciation Expense
    
(35,408,859
)
Vessel impairment charge
    
(129,027,862
)
Vessels and Vessel Improvements, at December 31, 2016
   $
567,592,950