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Note 8 - Discontinued Operations (Tables)
6 Months Ended
Jun. 30, 2019
Notes Tables  
Disposal Groups, Including Discontinued Operations [Table Text Block]
   
Six Months Ended June 30
(discontinued operations)
      2018       2019  
Statement of Operations Data    
Time charter revenue    
11,379,371
     
-
 
Commissions    
(642,898
)    
-
 
Voyage expenses    
(747,653
)    
-
 
Vessel operating expenses    
(4,443,003
)    
-
 
Drydocking expenses    
(1,442,657
)    
-
 
Related party management fees    
(800,621
)    
-
 
Vessel depreciation    
(2,531,778
)    
-
 
Other general and administrative expenses    
(1,189,720
)    
-
 
Operating (loss) / income    
(418,959
)    
-
 
Total other expenses, net    
(921,838
)    
-
 
Net loss    
(1,340,797
)    
-
 
Dividend Series B Preferred Shares    
(80,204
)    
-
 
Net loss attributable to common shareholders    
(1,421,001
)    
-