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Financial Instruments and Fair Value Disclosures (FV) (Details) - USD ($)
3 Months Ended 9 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Mar. 31, 2018
Derivative Instruments          
Change in fair value $ (6,669,266) $ 3,771,160 $ (3,910,190) $ 2,053,129  
Realized gain/(loss) on derivatives 881,276 (369,941) 2,494,832 (1,418,724)  
Interest rate swaps | Derivatives not designated as hedging instruments          
Derivative Instruments          
Gain/(loss) on derivatives, net (5,787,990) 3,401,219 (1,415,358) 634,405  
Interest rate swaps | Derivatives not designated as hedging instruments | Unrealized loss on derivatives          
Derivative Instruments          
Change in fair value (6,669,266) 3,771,160 (3,910,190) 2,053,129  
Interest rate swaps | Derivatives not designated as hedging instruments | Realized loss on derivatives          
Derivative Instruments          
Realized gain/(loss) on derivatives 881,276 $ (369,941) 2,494,832 $ (1,418,724)  
Interest rate swaps | Derivatives not designated as hedging instruments | Other non-current assets-Derivative instruments          
Derivative Instruments          
Derivative Asset $ 10,354,709   $ 10,354,709   $ 14,264,899