Interest and Finance Costs (Details) - USD ($)	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Interest and Finance Costs
Interest incurred	$ 27,422,693	$ 24,695,674	$ 14,350,900
Amortization of financing costs	7,506,509	3,709,421	2,499,185
Other finance costs	728,843	566,847	715,942
Capitalized interest			(4,809,014)
Total	$ 35,658,045	$ 28,971,942	$ 12,757,013