Voyage Expenses (Details) - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Voyage Expenses.
Bunkers	$ 1,345,360	$ 756,354	$ 817,676
Port charges and other related expenses	5,898	167,230	539,605
Brokers' commissions	469,143	440,955	631,659
Security cost	272,985	277,487	117,368
War risk insurances	1,095,156	13,052	12,310
Other voyage expenses	54,381	42,805	95,155
Total voyage expenses	$ 3,242,923	$ 1,697,883	$ 2,213,773