Interest and Finance Costs (Details) - USD ($)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Interest and Finance Costs
Interest incurred	$ 36,638,171	$ 27,422,693	$ 24,695,674
Amortization of financing costs	3,136,051	7,506,509	3,709,421
Other finance costs	875,009	728,843	566,847
Total	$ 40,649,231	$ 35,658,045	$ 28,971,942