Voyage Expenses (Details) - USD ($)	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Voyage Expenses.
Bunkers	$ 817,676	$ 804,371	$ 7,240,544
Port charges and other related expenses	539,605	886,651	2,558,697
Brokers' commissions	631,659	684,302	1,335,584
Security cost	117,368	390,330	370,762
War risk insurances	12,310	40,704	219,261
Other voyage expenses	95,155	159,620	339,834
Total voyage expenses	$ 2,213,773	$ 2,965,978	$ 12,064,682