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Vessels, net (Tables)
 12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Summary of Vessels, Net
The amounts shown in the accompanying consolidated balance sheets are analyzed as follows:
 
    
Vessel cost
     
Accumulated
Depreciation
     
Net Book
Value
  
Balance, December 31, 2018
   
 
1,105,413,815
 
   
 
(220,665,124
) 
   
 
884,748,691
 
Impairment loss
      (3,250,000 )       2,256,084        (993,916 ) 
Disposal
      (14,561,832 )       3,653,193        (10,908,639 ) 
Depreciation for the year
      —          (37,693,733 )       (37,693,733 ) 
    
 
 
     
 
 
     
 
 
  
Balance, December 31, 2019
   
 
1,087,601,983
 
   
 
(252,449,580
) 
   
 
835,152,403
 
Additions
      44,894,678        —          44,894,678  
Impairment loss
      (14,511,735 )       10,654,428        (3,857,307 ) 
Disposals
      (6,500,000 )       100,378        (6,399,622 ) 
Depreciation for the year
      —          (37,455,093 )       (37,455,093 ) 
Balance, December 31, 2020
   
 
1,111,484,926
 
   
 
(279,149,867
) 
   
 
832,335,059