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Note 17 - Voyage Expenses and Vessel Operating Expenses
 12 Months Ended
Dec. 31, 2017
Notes to Financial Statements  
Voyage Expenses and Vessel Operating Expenses [Text Block]
17.
Voyage Expenses and Vessel Operating Expenses
 
The amounts in the accompanying consolidated statements of operations are analyzed as follows:
 
    Year ended December 31,  
Voyage Expenses   2015     2016     2017  
Port expenses    
3,960,574
      
3,306,157
      
2,546,926
  
Bunkers    
8,566,490
      
6,117,326
      
6,668,126
  
Commissions    
4,112,177
      
4,259,812
      
4,584,612
  
Other voyage expenses    
936,297
      
1,706,970
      
1,916,873
  
                         
Total    
17,575,538
      
15,390,265
      
15,716,537
  
 
    Year ended December 31,  
Vessels’ Operating Expenses   2015     2016     2017  
Crew wages and related costs    
31,391,419
      
36,821,527
      
37,345,800
  
Insurance    
2,415,028
      
2,421,948
      
2,016,647
  
Repairs and maintenance    
5,091,916
      
5,724,148
      
6,424,557
  
Spares and consumable stores    
7,978,592
      
8,514,293
      
8,508,276
  
Miscellaneous expenses    
3,777,670
      
5,340,920
      
5,124,154
  
                         
Total    
50,654,625
      
58,822,836
      
59,419,434