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Inventories
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Inventories
4.
Inventories
The amounts shown in the accompanying consolidated balance sheets are analyzed as follows:
 
   
December 31,
 
   
2018
   
2019
 
Bunkers
   1,082,384    1,112,667 
Lubricants
   1,264,339    1,335,036 
  
 
 
   
 
 
 
Total
  
 
2,346,723
 
  
 
2,447,703