Leases (Charter hire expenses) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Time Charter-in
Charter hire expenses	$ 4,917,012	$ 4,392,132	$ 10,829,050	$ 13,626,580