Interest and Finance Costs (Details) - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Interest and Finance Costs
Interest incurred	$ 32,355,390	$ 36,638,171	$ 27,422,693
Amortization of financing costs	2,893,392	3,136,051	7,506,509
Other finance costs	856,759	875,009	728,843
Total	$ 36,105,541	$ 40,649,231	$ 35,658,045