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Note 3 - Vessels, Net (Tables)
6 Months Ended
Jun. 30, 2019
Notes Tables  
Property, Plant and Equipment [Table Text Block]
      Costs    
 
Accumulated
Depreciation
 
 
 
Net Book
Value
 
             
Balance, January 1, 2019    
61,279,976
     
(12,453,848
)    
48,826,128
 
Depreciation for the period    
-
     
(1,597,424
)    
(1,597,424
)
Balance, June 30, 2019    
61,279,976
     
(14,051,272
)    
47,228,704