Vessel Operating Expenses (Details) - USD ($)	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Vessel Operating Expenses.
Crew wages and related costs	$ 44,950,878	$ 44,017,660	$ 42,683,848
Spares and stores	14,486,392	17,061,388	13,249,931
Repairs and maintenance costs	4,528,776	6,096,812	4,416,259
Insurance	4,056,225	3,942,622	4,173,052
Lubricants	3,351,279	3,241,330	3,607,749
Miscellaneous expenses	2,830,668	3,860,057	3,347,530
Total	$ 74,204,218	$ 78,219,869	$ 71,478,369