Voyage Expenses (Details) - USD ($)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Voyage Expenses.
Bunkers	$ 756,354	$ 817,676	$ 804,371
Port charges and other related expenses	167,230	539,605	886,651
Brokers' commissions	440,955	631,659	684,302
Security cost	277,487	117,368	390,330
War risk insurances	13,052	12,310	40,704
Other voyage expenses	42,805	95,155	159,620
Total voyage expenses	$ 1,697,883	$ 2,213,773	$ 2,965,978