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Interest expense and finance costs
3 Months Ended
Mar. 31, 2019
Interest Expense And Finance Costs [Abstract]  
Interest expense and finance costs
8.
Interest expense and finance costs
 
 
 
Three months ended
 
 
 
Mar 31, 2019
 
 
Mar 31, 2018
 
Interest incurred
 
 
6,442,772
 
 
 
5,109,737
 
Amortization of deferred finance fees
 
 
514,888
 
 
 
592,254
 
 
 
 
6,957,660
 
 
 
5,701,991